Problem: A fireman of 80 kg slides down a pole. When he reaches the bottom, 4.2 m below his starting point, his speed is 2.2 m/s. By how much has thermal energy increased during his slide?

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Change in thermal energy:

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Problem Details

A fireman of 80 kg slides down a pole. When he reaches the bottom, 4.2 m below his starting point, his speed is 2.2 m/s. 

By how much has thermal energy increased during his slide?

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