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 |