Question

what is the primary concept of newtons first law? force equals mass times acceleration. objects in motion stay in motion unless acted upon by a force. for every action, there is an equal and opposite reaction.

Explanation:

Newton's First Law states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Answer:

Objects in motion stay in motion unless acted upon by a force.