Define Newtons second law of motion with an example?

Answer 1

Newton's second law of motion states that a force experienced by a body is equal to the rate of change in it's momentum ( F = m.dV/dt ). You will know that rate of change in velocity is acceleration so it is commonly written as F = ma.

An example of this is sliding an object across across a frictionless surface in a vacuum. The object will continue with it's original velocity.

(i.e. no external forces = no change in momentum).

Answer 2

Newton's second law of motion states that the acceleration of an object is directly proportional to the net external force acting on it, and inversely proportional to its mass. It can be mathematically expressed as ( F = ma ), where ( F ) is the net force, ( m ) is the mass of the object, and ( a ) is the acceleration. For example, if you push a heavier box and a lighter box with the same force, the heavier box will have a smaller acceleration due to its higher mass compared to the lighter box.