click below
click below
Normal Size Small Size show me how
Linear Motion
| Question | Answer |
|---|---|
| Second | The unit of time |
| Metre | The unit of distance |
| Speed | The rate of change of distance with respect to time |
| Metre per second | The unit of speed |
| Instantaneous speed | Average speed over a very short time |
| Average speed | Average speed over the whole journey |
| Displacement | Distance in a given direction, measured in metres |
| Velocity | The rate of change of displacement with respect to time. The unit is the meter per second |
| Acceleration | Acceleration is the rate of change of velocity with respect to time. The unit is the m/s2 |
| Equations of motion | V = u + at S = ut + ½ at2 V2 = u2 + 2as |
| Acceleration due to Gravity “g” | In the absence of resistance all objects will fall with the same acceleration when they are near the earth’s surface. This acceleration is g. It is 9.8ms-2 on the surface of the earth |
| Scalar Quantity | A quantity which has magnitude only |
| Vector Quantity | A quantity which has both magnitude and direction |