State Newton's second law of motion.What information do you get from it?

### Asked by Bhasharaj | 6th Oct, 2020, 10:21: PM

Expert Answer:

### The rate of change of momentum of a body is directly proportional to the applied force and occurs in the direction in which the force acts.
Thus,
Force α Change in momentum/ time
Hence, F α ma
F = kma
k =1
Thus,
F = ma ...(*)
Thus, Newton’s second law of motion provides a method to measure the force on a body as a product of its mass and acceleration.
From eqn (*),
F = (mv - mu)/t
Hence,
If F = 0,
v =u
This means if the external force is zero, then the body continues to move uniformly throughout its motion.

### Answered by Shiwani Sawant | 6th Oct, 2020, 11:52: PM

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