Displacement-time graphs
Velocity = Displacement / Time.
Gradient = Velocity
Velocity time graphs
Acceleration = Change in velocity / Time taken
Gradient = acceleration
Area under the graph = displacement.
Experiment
- The transmitter of a motion sensor sends out pulses of ultrasound and infared radiation that are picked up by the reciever.
- The distance of the transmitter from the sensor is continuously recorded.
- The sensor is interfaced with a computer with data sampling software to measure the position of the trolley at fixed time intervals.
- The trolley may be pulled along the runway at constant velocity or allowed to accelerate down an inclined plane.
- Displacement-time graphs can be drawn from the results.
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