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Science 3b
| Question | Answer |
|---|---|
| Force | A push or pull acting on an object |
| Mass | The amount of matter in an object ;measured in kg |
| Motion | A change in object's position over time |
| Speed | How fast an object moves; calculated as distance/tme |
| Distance | The length of the path an object travels |
| Velocity | Speed in a direction |
| Acceleration | Rate at which velocity changes; speeding up or slowing down or changing direction |
| Inertia | Tendency of an object to resist changes in motion; related to mas |
| Newton's first law | An object stays at rest and on object in motion stays in motion unless acted on by unbalanced force. |
| Newton's second law (Law of acceleration) | Force equals mass time acceleration (F=m x a) The greater the mass the more force needed to accelerate it. |
| Newton's third law | For every action, there is an equal and opposite reaction |
| Balanced forced | Forces acting on an object that are equal in size and opposite direction;no change in motion |
| Unbalanced forces | Forces that are not equal;causes a change in motion |
| Friction | A force that opposes motion between 2 surfaces in motion |
| Gravity | A force that pulls objects each other, on earth; it pulls objects towards the center of the planet |
Created by:
2000140797