Physics
posted by Lesley
How much work must be done to accelerate an 8x105 kg train: a) from 10 m/s to 15 m/s; b) from 15 m/s to 20 m/s; c) to a stop an initial speed of 20 m/s?

bobpursley
Look at the change in KEnergy. That is equal to the work involved.
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