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N 1st law and motion
| Term | Definition |
|---|---|
| Newton's first law | An object at rest will stay at rest and an object in motion will stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force. |
| Mass | a measure of the amount of matter an object contains. Also, a measure of the amount of inertia an object has. |
| Inertia | the resistance an object has to changes in its motion. |
| Force | any push or pull (interaction) that can cause a change in motion. |