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| AN OBJECT AT REST WILL STAY AT REST AND AN OBJECT IN MOTION WILL STAY IN MOTION AND IN SAME DIRECTION UNLESS ACTED UPON WITH AN UNBALANCED FORCE. |
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| THE CAR IS THE OBJECT IN MOTION AND THE WALL IS THE UNBALANCED FORCE. |
| THE PERSON ON THE SKATE BOARD IS THE OBJECT AND THE ROCK IS THE UNBALANCED FORCE |