Question

Newton's first law of motion states that an object stays in constant motion unless a(n) ______________ force acts on it.

Answer 1

1. Newton's First Law of Motion asserts that a body at rest will remain at rest unless an outside force acts on it, and a body in motion will remain in a straight line unless an outside force acts on it.

Hence, Newton's first law of motion states that an object stays in constant motion unless a(n) unbalanced force acts on it.