A girl pulls a 26 kg block 644 m along a level floor at


A girl pulls a 26 kg block 6.44 m along a level floor at constant speed with a horizontal force. If the coefficient of kinetic friction between block and floor is 0.25 , what is (a) the work done by the girl's force and (b) the increase in thermal energy of the block-floor system?

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Physics: A girl pulls a 26 kg block 644 m along a level floor at
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