Question

First second and third law of motion derivation

Answer 1

1st law is
if a body is at rest it want to be in rest untill and unless Any external force is applied on it.
3rd law
every action gives equal and opposite réaction

Mark it brillant

Answer 2

Explanation:

Newton's first law states that a body stays at rest if it is at rest and moves with a constant velocity unit if a net force is applied on it. Newton's second law states that the net force applied on the body is equal to the rate of change in its momentum.

F = ma

or F = m(v-u) / t

or Ft = mv - mu

That is, when F = 0, v = u for whatever time, t is taken. This means that the object will continue moving with uniform velocity, u throughout the time, t. If u is zero than v will also be zero, i.e., object will remain at rest.