Physics: Motion
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Speed
Distance/Time
Recognise from the shape of a speed-time graph when a body is: • at rest • moving with constant speed • moving with changing speed.
At rest: line at bottom Moving with constant speed: horizontal line Moving with changing speed: curved/straight diagonal line
Recognise linear motion for which the acceleration is constant, and calculate the acceleration.
Straight diagonal line. (final speed - initial speed)/time
Recognise motion for which the acceleration is not constant.
Curved diagonal line
Calculate the area under a speed-time graph to work out the distance travelled for motion with constant acceleration.
Distance = speed x time
Demonstrate a qualitative understanding that acceleration is related to changing speed.
Acceleration is related to changing speed