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Here we need to prove that a = F / m or there is an inverse relationship between acceleration (a) and mass (m) of the body if a force is applied on the body. We already know that according To Newton’s Second Law of Motion : F = ma  So from this equation, we get: a = F / m Now, here is the proof that: a = F / m Suppose a body of Mass 10 kg is moving by applying a Force of 30 N, then what is the acceleration of the body? We know that: F = ma a = F / m a = 30 / 10 = 3 Left Hand Side = a = 3m/s 2 Now taking Right Hand Side, we get: Right Hand Side = F / a Right Hand Side = 30 / 10 Right Hand Side = 3 (Newton / Kg) Hence a = F / m Hence we have proved that there is an inverse relationship between a and m of the body according to Newton’s Second Law of Motion .

Physics Questions Answers This is the equation of Newton’s Second Law of Motion . Here F is the force applied on the body, m is the mass of the body which is inversely proportional to the applied force and a is the acceleration produced in the body by the force and it is directly proportional to the applied force. Examples of Newton’s Second Law of Motion Example No. 1 Suppose a body of Mass 20 kg is moving by applying a Force of 40 N, then what is the acceleration of the body? We know that: F = ma a = F / m a = 40 / 20 =2 a = 2m/s 2 Hence Acceleration is 2ms -2 and it is produced in the body when a force of 40 N is applied on the mass of 20 Kg. Example No. 2 Suppose a body of Mass 20 kg is moving by applying a Force. The body is moving with an acceleration of 2ms -2 , then what Force (F) was applied on body? We know that: F = ma F = 20 x 2 F = 40 N Hence Force is 40 N and it is a...

Here we discuss about Newton’s third law of motion. You may also be interested in Newton’s First Law and Newton’s Second Law of Motion Newton’s 3rd Law states that: “Actions and reactions are Equal in magnitude but in opposite direction”. This law tells us the universal truth that all the bodies in the environments show pair of action-reaction forces that are equal in magnitude but opposite in direction. If an force is acted on a body and at the same time an reaction of equal magnitude act on this body in opposite direction, then we can write Newton’s Third Law in the form of an equation as shown below: F A = -F B Here F A is the Action that is exerted by body A on body B and as the result an reaction of force (-F B ) of equal in magnitude acts on body A from the body B. We should not miss up Newton’s First Law and Newton’s Law of Motion , because when we exert the force on the ground, then there is reaction of equal mag...

Here we discuss about Newton’s first law of motion. You may also be interested in Newton's Second Law of Motion The Newton’s First Law of Motion states that: “A body will continue to move or remain in a straight line unless an opposite force acts on it and change its position either moving or state of rest”. During the change of motion position or state of rest position, a body opposes to change called its Inertia and it depends upon the mass of the body. The higher the mass of a body, the move inertia it has and vice versa. For Example, when a car standing on the road, then the car in the rest position. To move the car we need to push the car or start the car with petrol. But, if we don’t have petrol, then huge force is required to change the position of the car to move it. So in this case, the car has more inertia. But when the car is moving, it is very easy to push on in the straight line, but now it is very difficult to stop the car a...

Here we discuss about Newton’s 2nd Law of Motion. Newton’s 2nd Law tells us that how a body behaves when there is not net force acting on it. The Newton’s 2nd Law states that: “The effect of an applied force on a body is to cause it to accelerate in the direction of Force. This Acceleration is directly or positively related to applied force and negatively or inversely related to mass of the body”. So, we can say that, New Second Law of Motion tells us that when we apply force to a body at its rest position, it will start to move in the direction of applied force till the end of applied force. Assumptions of the Law: 1. Suppose we apply force on a body that is moving in a straight line, then it will accelerate it velocity and the body will move as long as the force in in action. 2. If we apply the force on a body in the direction opposite to its motion, then the body will accelerate at low speed. If the applied force still continues in act...