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Simple machines
| Question | Answer |
|---|---|
| The push or pull upon an object | Force |
| The two things an object can change | Speed and direction |
| The object used to measure force | Spring scale |
| The unit used to measure force | Newtons |
| A force that resists the motion of objects | Friction |
| Things used to reduce friction | Lubricants |
| The person that discovered the law of gravitation | Sir issac Newton |