Question

Newton's first law of motion (law of inertia)​

Answer 1

Answer:

In the first law, an object will not change its motion unless a force acts on it.

Answer 2

Newton's First law:

       Newton's first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force. Newton's first law, also called the "Law of inertia".

  Conversely, if the objects velocity is not changing, them it must have a net force of zero. Mathematically,

             Fnet= 0   ↔ dv/dt=0

    Newton's first law describes objects that are in two different situations: objects that are stationary , and objects that are moving straight at a constant speed.

    An object which is undergoing a net force of zero is said  to be at mechanical equilibrium. An objects which has net forces of zero and which is not moving  is at mechanical equilibrium , but an object that is moving in a straight line with constant velocity is at mechanical equilibrium.