Question

what does newtons first law of motion state? a an object in motion will stay in motion unless acted upon by an external force. b force equals mass x acceleration. c for every action, there is an equal and opposite reaction. newtons laws! - checkpoint review #1!

Explanation:

Newton's first law of motion, also known as the law of inertia, states that an object in motion will stay in motion and an object at rest will stay at rest unless acted upon by an external force. Option B is Newton's second - law ($F = ma$) and option C is Newton's third - law.

Answer:

A. An object in motion will stay in motion unless acted upon by an external force.