Question

Derive the expression for force?
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Answer 1

As far as I've been able to find out, it comes from Newton's First Law: "every body persists in its state of being at rest or of moving uniformly straight forward, except insofar as it is compelled to change its state by force impressed". The body has a constant momentum in this case and a force would change the momentum over time, so F = dp/dt. At some point, Newton and other scientists defined the concept of force to be this change in momentum.

Answer 2

Answer:

F=ma

Explanation:

According to second law of motion

Force is directly proportional to rate of change in momentum

ie, F=momentum

F= (momentum formula (P) )=m1v1+m2v2/t

F=m. (v-u)/t

F=ma (a=v-u/t)