Question

Explain 1st law of motion mathematically . put the force 0 then explain?

Answer 1

Isaac Newton's first law of motion, also known as the law of inertia, states that an object at rest will stay at rest and an object in motion will stay in motion with the same speed and direction unless acted upon by unbalanced force. In other words, if no force acts on an object it will maintain a constant velocity (for an object at rest that velocity is equal to zero). With the first law of motion, Newton established the existence of a frame of reference for which his other laws of motion are applicable, called the inertial frame of reference. An inertial frame of reference is one in which the observer is moving at constant velocity (which includes being stationary).