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# State and prove Newton's Second Law of motion Class 9

### Newton's Second Law Of Motion - Derivation, Applications

Defining Newton's Second Law of Motion Newton's second law states that the acceleration of an object depends upon two variables - the net force acting on the object and the mass of the object. The acceleration of the body is directly proportional to the net force acting on the body and inversely proportional to the mass of the body State newton's second law of motion?Prove that F = m a. class 9 Circles Coordinate Geometry What is Democracy? Why Democracy? Nazism and the Rise of Hitler Socialism in Europe and the Russian Revolution. class 10 Verb Articles Some Applications of Trigonometry Real Numbers Pair of Linear Equations in Two Variables Newton's Second Law of Motion. Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object. Second Law of Motion Formul

### State newton's second law of motion?Prove that F = m

1. The second law of Newton can be described simply as the acceleration of an entity as produced by a net force is directly proportional to the magnitude of the net force, in the same path as the net force, and inversely proportional to the mass of the entity
2. Mathematical expression for newtons 2nd law of motion.F=ma.video explaining Newtons 2nd law of motion in a very easy.MUST WATCH VIDEO.Instagram- @edutop__Fac..
3. Newton's 2nd law states that the acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object. Newton's second law describes precisely how much an object will accelerate for a given net force
4. Chapter notes for CBSE Class 9 Science chapter 9, Force and Laws of Motion, are available here. These notes cover Newton's laws of motion and their applications in daily life
5. Which is Newton s 1 st law of motion. Derivation of 3 rd law: Consider an isolated system of two bodies A and B. An isolated system is such that no force acts on the system. This is the Newton s third law of motion for a body exerting some force on another. Thus, Newton s 2 nd law of motion is the most basic law of motion

### Mathematical Formulation Of Newton's Second Law Of Motio

1. Newton's second law of motion describes that, when a force is applied to an object, it produces acceleration in the object (i.e rate of change of velocity). For an object at rest, the applied force produces acceleration in the object and makes the object move in the direction of applied force
2. Newton's Second law of motion states that the force 'F' acting on a body of mass 'm' producing acceleration 'a' is equal to the product of the mass and acceleration of the body. That is, F = ma. It can be derived from the concept of momentum. Suppose a body of mass 'm' has initial velocity 'u' and after time 't' its.
3. Derivation of First Equation of Motion by Graphical Method. The first equation of motion can be derived using a velocity-time graph for a moving object with an initial velocity of u, final velocity v, and acceleration a.. In the above graph
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5. Newton's 2nd Law of Motion - Mathematical FormulationWatch more videos athttps://www.tutorialspoint.com/videotutorials/index.htmLecture By: Ms. Priyanka Chou..

For PDF Notes and best Assignments visit @ http://physicswallahalakhpandey.com/Live Classes, Video Lectures, Test Series, Lecturewise notes, topicwise DPP,. Newton's Second Law of Motion says that acceleration (gaining speed) happens when a force acts on a mass (object). Riding your bicycle is a good example of this law of motion at work. Your bicycle is the mass. Your leg muscles pushing pushing on the pedals of your bicycle is the force. When you push on the pedals, your bicycle accelerates

Second law is the real law of motion. This can be proved by showing that first law and third law are contained in second law of motion.(i) First law is contained in second law. According to the second law of motion, That is if no force is acting on the body then its acceleration is zero, means if a body is at rest, it remains at rest and if the body is moving in straight line with constant. For variable force, the shape of the force-time curve would be complicated but for a constant force, we will get a simpler rectangle. In any case, the overall net impulse only matters to understand the motion of an object following an impulse. Impulse Momentum numerical problems set 1 (solved) Impulse Momentum numerical problems set 2 (solved Newton's law of Motion is the three laws that deal in a relationship between the motion of an object and the force acting on it. In these three newton's laws, he explained what happens when a body is at rest or in motion or forced by an external force to bring the body in motion with their reactions Watch this video to understand one of the most revolutionary laws in Physics: Newton's First Law of Motion! To learn more about the Laws of Motion, enrol in. Rolling friction. Friction- A boon or Bane against motion. Circular motion. Motion of a car on a level road. Motion of a car on a banked road. Class 11 Physics Laws of Motion. Newtons Second Law. Newton's Second Law. The rate of change of momentum of a body is directly proportional to the applied force and takes place in the direction in.

### Prove that F = ma. - Physics Q&

1. Law of conservation of momentum states that total momentum of the system remains conserved in the absence of external force.. Proof: Consider two bodies of mass m 1 and m 2 moving with initial velocity u 1 and u 2 respectively. The two bodies collide with each other for a time interval 't'
2. Newton's First Law: Everybody continues to be in its state of rest or the state of uniform motion along a straight line unless it is acted upon by some external force. Newtons Second law: The force acting on a body is directly proportional to the rate of change of linear momentum of the body and the change in momentum takes place in the.
3. 10) Newton's third law of motion :- Newton's third law of motion states that :- 'To every action there is an equal and opposite reaction and they act on two different bodies.' To prove that action and reaction are equal and opposite :- Take two spring balances A and B connected together. Fix the spring balance B to a rigid support
4. A Deductive Proof of Newton's Third Law by Ken Amis. 1. Background. Every physics student learns Newton's three laws of motion. It's tempting to consider that these are three separate and independent laws. That's not so. Both the first and third laws may be mathematically derived from the second law, as we will show

S.I. unit of force is newton. A newton is that force which when acting on a body of mass 1 kg produces an acceleration of 1 m/ s 2. First law of motion is a special case of second law of motion because when applied force is zero,then acceleration is also zero and body remains in state of rest or uniform motion State Newton's second law of motion and prove F = ma by using it. Newton's 2nd law of motion states that acceleration produced in a body is directly proportional to the force applied and inversely proportional to the mass of the body. i.e. a ∝ F and a ∝ By combining these two, we get Newton's second law of motion states that the acceleration of a system is directly proportional to and in the same direction as the net external force acting on the system, and inversely proportional to its mass. In equation form, Newton's second law of motion is a = Fnet m a = F net m

### Force and Laws of Motion #2

State and prove newton's second law of motion. 2 See answers akanksha9839 akanksha9839 Explanation: according to newtons 2nd law of motion the rate of change of momentem is directly proportional to the force applied on it and the change in momentum is in the direction in which the force is applied Newton's second law of motion states that: The rate of change of momentum of a body is directly proportional to the force applied on it and the change in momentum takes place in the direction in which the force is applied Newton's second law of motion provided the quantitative value of force Study Material and Notes of Ch 9 Force and Laws of Motion Class 9th Science. → Proof of Newton's First law of motion from Second Law • Third law of Motion → Law of conservation of Momentum. the natural tendency of an object that resists the change in state of motion or rest of the object is called inertia Force and Laws of Motion Class 9 Notes Understanding the Lesson. 1. Force. 2. Balanced forces. When a number of forces acting simultaneously on a body do not bring about any change in state of rest or of uniform motion along a straight line, then forces acting on a body are said to be balanced forces. 3 Get Revision notes of Class 9th Science Chapter 9 Force and laws of motion to score good marks in your Exams. Our notes of Chapter 9 Force and laws of motion are prepared by Maths experts in an easy to remember format, covering all syllabus of CBSE, KVPY, NTSE, Olympiads, NCERT & other Competitive Exams

Start studying Newton's Second Law of Motion. Learn vocabulary, terms, and more with flashcards, games, and other study tools Example of newton's second law of motion: Hitting a baseball bat with the force. It is very easy to lift an empty bag compared to a heavy bag. The mass increases the force required to lift the bag. The weight of the aircraft is a very crucial factor. It is designated to carry only a specified load

The motion in a circle with constant speed is an example of accelerated motion. The force which is needed to make an object travel in circular path is called centripetal force. For Example : (1) Movement of artificial satellite around earth . (2) Motion of moon around earth. (3) Motion of earth around sun. (4) Tip of seconds hand of a watch State Newton's second law of motion? [2] 7. What is the momentum of a body of mass 200g moving with a velocity of 15 m/s. [2] 8. Define force and what are the various types of forces? [2] 9. A force of 25 N acts on a mass of 500g resting on a frictionless surface. What is the acceleration produced? [2] 10 Newton's First Law: Everybody continues to be in its state of rest or the state of uniform motion along a straight line unless it is acted upon by some external force. Newtons Second law: The force acting on a body is directly proportional to the rate of change of linear momentum of the body and the change in momentum takes place in the. Class-9 » Science. Force and Laws of Motion. state newton`s second law of motion and prove f=ma. Share with your friends. Share 2. According to Newton's 2 nd law of motion, F = ma. Where, F is the force applied, m is the mass of the body and a is the acceleration of the body. So

### Newton's Laws of Motion - First, Second And Third Laws of

• NCERT Solutions Class 9 Science Chapter 9 Force and Laws of Motion - Here are all the NCERT solutions for Class 9 Science Chapter 9. This solution contains questions, answers, images, step by step explanations of the complete Chapter 9 titled Force and Laws of Motion of Science taught in class 9
• Extra Questions for Class 9 Science Chapter 10 Gravitation. Prove that if the earth attracts two bodies placed at same distance from the centre of the earth with the same force, then their masses are equal. We know from Newton's second law of motion that the force is the product of mass and acceleration
• Newton's second law of motion states that rate of change of momentum of an object is directly proportional to the applied force and takes place in the direction in which the force acts. → v = u (2) This means initial velocity is equal to final velocity when no force acts on the body. Thus, equation (2) represents Newton's first law of motion
• According to newton second law F = m X a a= (v - u)/t. F = m(v -u)/t F = (mv - mu)/t As F= m X a Chapter 3 Laws of Motion Exercise | Q 57 | Page 130. Advertisement Remove all ads. CBSE Previous Year Question Paper With Solution for Class 10; Maharashtra State Board Previous Year Question Paper With Solution for Class 12 Arts

### CBSE Class 9 Science, Force and Laws of Motion: Chapter

Newton's Second Law of Motion . Newton's Second Law of Motion states that when a force acts on an object, it will cause the object to accelerate. The larger the mass of the object, the greater the force will need to be to cause it to accelerate. This Law may be written as force = mass x acceleration or Equation for Velocity-Time relation by graphical method: First equation of Motion. Let an object is moving with uniform acceleration. Let the initial velocity of the object = u. Let the object is moving with uniform acceleration, a. Let object reaches at point B after time, t and its final velocity becomes, v Newton's third law of motion states that every action has an equal and opposite reaction, then, F a b = − F b a [ ' -- ' sign is used to indicate that 1 object is moving in opposite direction after collision] Using [i] and [ii] , we have. t m B v B − m B u B = − t m A v A − m A u A m B v B − m B u B = − m A v A + m A u The following are the three equation of motion: First Equation of Motion: v = u + at. Second Equation of Motion: s = ut + 1/2 (at 2) Third Equation of Motion: v 2 = u 2 - 2as. where, v and u are the initial and the final velocities, a is the acceleration, t is the time taken and s is the displacement of an object Derivation of Newton's first law of motion from Newton's second law of motion Newton's first law states that a body stays at rest if it is at rest and moves with a constant velocity if already moving, until a net force is applied to it. In other words, the state of motion of a body changes only on application of a net non-zero force

Week 4 Lesson No 10 45 mints Class Test: 1 (Chapter-1,2,3) Lesson No 11 45 mints Class test exam Script distribution and question solve. State Newton's laws of motion, Prove P=mf, from Newton's 2nd law of motion, Solve Math Problem. Lesson No 15 45 mints Chapter-5: Define and explain the Kepler's Law, Define gravity and gravitation, State. Experiment 5: Newton's Second Law 29 Advance Reading Text: Newton's SecondLaw, acceleration, velocity, dis-placement, vectors. Lab Manual: Appendix C Objective The objective of this lab is to explore and analyze the relationship between force, mass, and acceleration. Theory According to Newton's Second Law, the acceleration

### prove that newtons second law of motion is called real law

• In classical mechanics, Newton's laws of motion are three laws that describe the relationship between the motion of an object and the forces acting on it. The first law states that an object either remains at rest or continues to move at a constant velocity, unless it is acted upon by an external force. The second law states that the rate of change of momentum of an object is directly.
• Let us consider an object of mass m which is moving under the influence of constant force F. From Newton's second law of motion: F = ma. Where, a = acceleration of the object. The velocity of the object increases from v 1 to v 2 due to the acceleration, and the object displaces by a distance d. v 2 2 −v 1 2 =2ad, or. a = (v 2 2 −v 1 2)/2d.
• This is the third investigation in a series of NASCAR themed races on forces and motion! In the ACCELERATION 500, students will prove Newton's 2nd law of motion is correct. Students will use a toy car, pennies/weights, and a straw or Hot Wheel launcher to show how the mass of an object affects it's motion
• Newton's Second Law of Motion states that 'when an object is acted on by an outside force, the strength of the force equals the mass of the object times the resulting acceleration'. In other words, the formula to use in calculating force is force = mass x acceleration. Opposing forces such as friction can be added or subtracted from the.
• Derive relation F = ma from Newton 2nd Law of Motion Let us derive the relation of force F = ma from Newton's second law: According to the Newton's 2 nd Law of motion, the rate of change of linear momentum of a body is directly proportional to the applied external force and in the direction of force
• Newton's second law of motion is also known as : * 2 points A Law of inertia Prove that Newton's second law is the real law of motion. asked Feb 1 in Physics by Aabhat (31.0k points) laws of motion; class-11; 0 votes. 1 answer. force and laws of motion; class-9.

### Newton's Second Law of Motion - Statement, Applications

1. a) Name and state the law used to explain the above situation. b) State the law of conservation of linear momen turn and prove it on the basis of second law of motion. c) State true or false. An iron ball and a wodden ball of the same radius are released from a height in vaccum; the iron ball will reach the ground first. Answer: a) Newtons.
2. Newton's second law of motion states that: the net external force applied on an object is directly proportional to the rate of change of linear momentum of the object. Let the external force be F, initial velocity be u ,final velocity be v, the ti..
3. In the second law of Newton , Known as the Fundamental Principle of Dynamics, the scientist states that the larger the mass of an object, the more force will be required to accelerate it.. That is, the acceleration of the object is directly proportional to the net force acting on it and inversely proportional to that of the object
4. Newton's second law is really the law of conservation of momentum written in another way. Objects will maintain their momentum until a force is applied, and that force will change their momentum
5. a) State Newton's third law of motion and give two examples to illustrate the law. b) Explain why when a asked Jul 8, 2020 in Physics by Amrita01 ( 49.5k points
6. Newton law of motion Fundamental , Displacement, Speed and Velocity HC VERMA SOLUTION MOTION CLASS 9 Class 9 Physics S Chand Book Pdf Download, Science for Class 9 | ABHISHEK KUMAR How to prove equations of motion in easy Chapter 8 Science #02(B)#9th#PHYSICS#CBSE #SHORT ANSWER TYPE QUESTION#CHAPTER:1#LAKHMIR SINGH #MANJIT KAUR CLASS 9.
7. A scientific law is a statement that describes what always happens under certain conditions in nature. An example of a scientific law is the law of gravity, which was discovered by Sir Isaac Newton. The law of gravity states that objects always fall towards Earth because of the pull of gravity. Based on this law, Newton could explain many.

Opinion for Wright v. State, 690 N.E.2d 1098 — Brought to you by Free Law Project, a non-profit dedicated to creating high quality open legal information Newton, who was born the same year that Galileo died, would build on Galileo's ideas to demonstrate that the laws of motion in the heavens and the laws of motion on the earth were one and the same. Thus, Galileo began and Newton completed a synthesis of astronomy and physics in which the former was recognized as but a particula Newton's Second Law of Motion . Newton's Second Law of Motion states that when a force acts on an object, it will cause the object to accelerate. The larger the mass of the object, the greater the force will need to be to cause it to accelerate. This Law may be written as force = mass x acceleration or Chapter 9 Force And Laws Of Motion - What is force, Why the push and pull definition of force is incorrect, What are Balanced and Unbalanced forces, What is Newton's First Law of Motion, What is intertia, What does inertia depend upon, Real life examples of Intertia like passenger on moving bus, removing dust particles from carpet by beating, etc

### State and Explain Newton'S Second Law of Motion

1. Experiment. That's the only evidence. Even then, there are many experiments which disagree with Newton's laws. The second law of motion is not a law; it's a postulate. There is nothing which we can call a law in science because we are forced.
2. Newton's 2nd Law says that an object accelerates if there is a net (unbalanced) force on it. Looking at the wagon in the diagram above, you can see that there is just one force exerted on the wagon - the force that the horse exerts on it
3. The SI unit of torque is newtons times meters, usually written as N · m. For example, if you push perpendicular to the door with a force of 40 N at a distance of 0.800 m from the hinges, you exert a torque of 32 N · m (0.800 m × 40 N × sin 90º) relative to the hinges
4. Class 9 Physics Motion. Equations of Motion by Graphical Method. Equations of Motion by Graphical Method. Velocity-Time Relation. A car having initial velocity u , is being subjected to a uniform acceleration a for a time period of t , after the time t the final velocity of the car is v. Now we need to find the relation between v,u,a,t graphically

A force, when it acts on a system, in a single direction and with a certain magnitude. illustrated w/ an arrow. List the four mechanical (contact) forces and give an example of each. Compression - pushing something together with you hands. Tension- the leash when walking a dog. Torsion-untwisting a cap off the bottle Newton's Laws of Motion Newton's First Law of Motion - Class 9 Tutorial Newton's First Law of Motion Newtons First Law Force, Work and TO prove it, let us write the second law of motion, f=ma. If no to continue in its current state of motion unless acted upon by a net force, is Page 7/20. Bookmark File PDF Grade 11newton

### Derivation of Equations of Motion - Algebraic, Graphical

Newton also stated three laws of motion. They are known as the first, second, and third law of motion. First Law: It states that a body at uniform motion or rest will remain in its original state until and unless an external force applies to it. Second Law: In short, force is directly proportional to the product of the mass of the body and its. Newton's second law describes the affect of net force and mass upon the acceleration of an object. Often expressed as the equation a = Fnet/m (or rearranged to Fnet=m*a), the equation is probably the most important equation in all of Mechanics. It is used to predict how an object will accelerated (magnitude and direction) in the presence of an unbalanced force The objective of this experiment is to verify the validity of Newton's second law, which states that the net force acting on an object is directly proportional to its acceleration. Eq. (9) m 1 g = ( m 1 + m 2) a + f. was derived on the basis of this law. Therefore we can consider Eq Mechanics: Newton's Three Laws of Motion Second Law : A particle of mass m acted upon by an unbalanced force F experiences an acceleration a that has the same direction as the force and a magnitude that is directly proportional to the force. m F = ma Second Law forms the basis for most of the analysis in Dynamic Newton's second law states that the acceleration of an object is directly related to the net force and inversely related to its mass. Acceleration of an object depends on two things, force and mass. This shows that the bowling experiences a much greater force. But because of the big mass, it resists acceleration more

Second Law of Motion relate to gravity? To understand Newton's Law of Gravitation, you must first under-stand the nature of force and acceleration when applied to circular motion, rather than motion in a straight line. Newton's First Law of Motion tells us that, without the influence of an unbalanced force, an object wil Derivation of the Law of Conservation of Momentum | Derive the principle of conservation of Linear Momentum. As per Newton's 2nd Law of motion, force F = ∆p/∆t (1) [here, ∆p/∆t = (change in momentum)/(elapsed time) = rate of change of momentum] In an isolated system, the net external force is zero, F = 0 Hence from equation (1) for that isolated system we get, ∆p/∆t = 0 this. FORCE AND LAWS OF MOTION. (CHAPTER - 9): FORCE AND LAWS OF MOTION. 1) Force :-. Force is an external effort which may move a body at rest or stop a moving body or change the speed of a moving body or change the direction of a moving body or change the shape and size of a body. Effects of force :- The teacher supplies clay. Have each child roll out their clay into a flat pancake. As the children do the rolling explain to them that they are experiencing Newton's Second Law of Motion(which is: The Second Law defines what happens when a force acts on an object - the object accelerates in the direction in which the force is acting) According to Newton's third law of motion, the impulsive force applied by the first object on the second one is equal and opposite to the impulsive force applied by the second object on the first object. NCERT Solutions for Class 9 Science. Reference Book Solutions. HC Verma Solutions. RD Sharma Solutions

### Video: Force 06 : Newton's Second law of motion (CBSE , Class IX

Newton's second law of motion is called real law of motion because first and third laws of motion can be obtained from it. The modern version of these laws are as follows (i) A body continues in its initial state of rest or motion with uniform velocity unless an unbalanced external force is acted on it But do you know that the Newton's second law is known as the real law of the motion. Let us prove it by showing that the Newton's first law is contained in the second law. Proof: let us take an isolated system that is system isolated or free from external forces. From this law F = ma, where F is force, m is mass of object and a = acceleration Southern Polytechnic State University A PowerPoint Presentation by Paul E. Tippens, Professor of Physics Newton's 2nd law for circular motion: (80 kg)(4 m/s) 2 Newton's 2nd Law to x and y axes Due to this force the momentum is changed from $$\vec{p}$$ to p + ∆p. Then according to Newtons second law, we can write Where K is a constant pf proportionality. When we take the limit ∆t → 0, we can write. Question 8. According to Newton's law of motion rate of change of momentum is directly proportional to applied force. a Consider balls A and B of masses m A and m B moving in the same direction along a straight line with velocities u A and u B.They collide for time t. After collision their velocities become v A and v B.. Force exerted by A on B is: F AB = Rate of change of momentum of B =. Force exerted by B on A is

### Newton's 2nd Law of Motion - Mathematical Formulation

Newton's Second Law of Motion When a net force act on an object, the object accelerates in the direction of the net force. The acceleration is directly proportional to the net force and inversely proportional to a —F/m or, a ocF/m the mass. 6.3(B) Newton's Second Law (Weight) Newton's second law of motion Newton's second law of motion 2.2.1 Free Body Diagrams and Newton's Laws. A free body diagram is a diagram that has all the forces acting on an object drawn on one diagram. It is relatively straight forward to draw. Once the diagram is drawn the force vectors are resolved into x and y and then summed to calculate a net resultant force Newton's 2nd Law Lab Introduction: The purpose of this lab was to prove Newton's 2nd Law; which states accelerate equals force divided by mass (a=F/m). During this lab we were trying to find out the relationship between acceleration, force, and mass by using a air track, glider with picket fence, and photogates Follows Newton's Law of Universal Gravitation By Newton's second law , F = mg Compare with F = mg so g = GM/r2 g depends inversely on the square of the distance g depends on the mass of the planet Nominally, g = 9.81 m/s2 or 32.2 ft/s2 • At the equator g = 9.78 m/s2 • -At the North pole g = 9.83 m/s2 • g on the Moon is 1/6 of g on Earth Here at Takshila Learning, we provide Online Tuition Classes from Preschool to Class 12 for all subjects. We provide the best online tuition classes that comprise Animated Video lectures and Live Online Classes that will help students to grasp concepts easily. We also provide Worksheets & Assignments, Doubt sessions, Free Encyclopedia, NCERT Solutions, and Exam Guru to monitor your progress, i.

This statement of Newton's second law of motion includes the more familiar F net = ma as a special case. We can derive this form as follows. First, note that the change in momentum Δp is given by Δp = Δ(mv).If the mass of the system is constant, then Δ(mv) = mΔv.So that for constant mass, Newton's second law of motion become Before I start my discussion here I would like to state the first two laws of Newton in their most correct forms: 1)1st Law: There exist frames of reference with respect to which every body continues to be at rest or in uniform motion in a straight line until compelled by an external force to change that state. Such frames are called inertial frames. 2)2nd Law: In an inertial frame, if. Law of conservation of momentum . From the principle of impulse and momentum, impulse of a force, J = mv - mu If J = 0 then mv - mu = 0 (or) mv = mu (i.e) final momentum = initial momentum. In general, the total momentum of the system is always a constant (i.e) when the impulse due to external forces is zero, the momentum of the system remains constant

### Class 11 Chap 5 Laws Of Motion 02 Newton's Second

Newton's first law states that a body stays at rest if it is at rest and moves with a constant velocity unit if a net force is applied on it. Newton's second law states that the net force applied on the body is equal to the rate of change in its momentum. F = ma or F = m(v-u) / t or Ft = mv - mu That is, when F = 0, v = u for whatever time, t. State and explain Newton's third law of motion. Give illustrations for the same. Answer: Newton's third law states that for every action, there is an equal and opposite reaction. Let F 1 be the force exerted by the body A on body B, F 1 is called action. Then force F 2 exerted by B on A is called reaction. According to the third law F 1. Q1: Define inertia. State Newton's second law of motion and prove that Newton's first law of motion is a special case of Newton's second law of motion. Answer Forces And Motion Test Grade 7 A change in momentum occurs when a net force is applied to an object over a time interval. Two horizontal forces, 225 N and 165 N, are exerted on a canoe