Question

A force acts on an object of mass 2kg and changes its velocity from 3 m/s to 7 m/s in in 4 second , then magnitude of force is​

Answer 1

Answer:

F =

$2(7 - 3) \div 4$

2 x 4 /4

2 N is the answer

Answer 2

Explanation:

Newton's second law of motion states that the force applied to the system is equal to the time rate of change of momentum.

So,    F=dtdP

But   P=mv

So,    F=dtd(mv)

Or   F=mdtdv

⟹ F=ma