An object moving vertically in a straight line can be modelled as a particle with a constant downward acceleration of g = 9.8 ms^2
The gradient of a speed time graph illustrating the motion of a particle represents the acceleration of the particle.
The area under a speed time graph illustrating the motion of a particle represents the distance moved by the particle.
Area of a trapezium = average of the parallel sides X height
= ½ (a+b)h
A constant speed, distance = speed X time
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