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science
energy
| Question | Answer |
|---|---|
| Force | A push or pull that can change the motion of an object. |
| Balanced forces | separate forces on an object that combined do not change the movement of the object. |
| Unbalanced forces | Forces on an object that cause in the motion of the object. |
| Net force | the sum of all the forces acting on an object. |
| At rest | The state of an object when it is not in motion. |
| Motion | The change in an objects position with respect to time and in comparison to the position of other objects used as reference points. |
| Speed | The rate of change of position ( or distance traveled)with respect to time; units in which speed in measured are expressed as distance per time ( example:meters per second). |
| Direction | A straight path that an object can move along. |
| Friction | Force that opposes the motion of one surface across another |