A worker pushed a 27 kg block92m along a level floor at, Physics

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A worker pushed a 27 kg block92m along a level floor at

A worker pushed a 27 kg block9.2m along a level floor at constant speed with a force directed27°below the horizontal.

(a) If the coefficient of kinetic friction is 0.20, how much work was done by the worker's force?
_______________ J

(b) What was the increase in thermal energy of the block-floor system?
_______________ J

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Physics: A worker pushed a 27 kg block92m along a level floor at

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