newton's first law

Question

Which statement best expresses Newton's First Law?

RankGuru · Accepted Answer

Newton's First Law of Motion, also known as the Law of Inertia, states that every object continues in its state of rest or of uniform motion in a straight line unless it is compelled to change that state by forces impressed upon it. 
- **Inertia**: The inherent property of an object to resist changes in its state of motion.
- **Force**: Defined qualitatively as the agent that causes a change in the state of motion. 
If $\sum \vec{F}_{ext} = 0$, then $\vec{v} = 	ext{constant}$.

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