An ‘E-bike’ is a bicycle that is assisted by an electric motor. Figure 1 shows an E-bike and rider with a total mass of 95 kg moving up an incline.
Figure 1
The cyclist begins at rest at A and accelerates uniformly to B in 21 s. The distance between A and B is 110 m.
Calculate the kinetic energy of the E-bike and rider when at B.
Give your answer to an appropriate number of significant figures.
Calculate the gravitational potential energy gained by the E-bike and rider between A and B.
Between A and B, the work done by the electric motor is 8100 J, and the work done by the cyclist pedalling is 11 900 J.
Calculate the wasted energy as the cyclist travels from A to B.
State two causes of this wasted energy.
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