### Practice

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- "Objects in motion tend to stay in and objects at rest tend to stay at ." This is Newton's 1st law and is often called the law of .
- Newton's 2nd law is expressed as a math formula. F = M x A.

= x acceleration - Newton's 3rd law states that for every action there is an equal and opposite .

1. motion, rest, inertia
2. force, mass
3. reaction

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