Distance, speed and acceleration

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  • Created by: Nadia
  • Created on: 20-12-12 16:05
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  • distance, speed and acceleration
    • Speed is a measure of how fast an object/ animal is moving
      • speed=distance (m) / time (s)
      • speed is a scalar quantity (only has magnitude)
    • Velocity is a vector and has direction as well as magnitude
      • velocity is measured in metres per second, in a specified direction
    • on distance-time graphs stationary objects are shown by flat straight lines
      • objects travelling at constant velocity are shown by straight sloping lines
      • the speed of an object can be found by measuringthe gradient of the graph
    • acceleration is the rate of change of velocity
      • objectsgoing faster are accelerating, objectsgoing slower are decelerating
      • units of acceleration are m/s^2
    • on velocity-time graphs objects travelling at constant velocity are shown by straight lines
      • a straight line sloping downwards indicates an object decelerating
      • the acceleration can be found by measuringthe gradient of the velocity-time graph
      • the area under the graph is the distance travelled

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