- #1
Dongorgon
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Homework Statement
An engineer was to design a bicycle that can be powered only by an electric motor. The bicycle can carry an 80kg rider at a maximum speed of 6m/s. Under these conditions the maximum distance the bicycle can cover before the battery needs to be recharged is 32km. The bicycle has a mass of 30kg. Calculate the maximum kinetic energy of the bicycle and rider when the rider is not pedalling.
The Attempt at a Solution
Assuming that no resistance force acts, what I've done is to consider the work done as equal to the change in kinetic energy over the entire displacement.
From this: WD=110x9.8x32000=34496000J
Hence, KEmax=34496000J
Which also is the entire stored energy of the battery.
Is this a correct way, and would this answer be sufficient? Thanks