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A rope is used to pull a 3.57 kg block at constant speed 5.10 m along a horizontal floor. The force on the block from the rope is 6.82 N and is directed 15° above the horizontal.
(a)What is the work done by the rope's force?
(b) What is the increase in the thermal energy of the block-floor system?
(c) What is the coefficient of kinetic friction between the block and floor?
(a)What is the work done by the rope's force?
(b) What is the increase in the thermal energy of the block-floor system?
(c) What is the coefficient of kinetic friction between the block and floor?
Answers
Answered by
drwls
a) 6.82N * cos 15 * 5.1 m = ___ Joules
b) The same, since KE does not increase
c) 6.82 cos15/(M g) = 0.188
b) The same, since KE does not increase
c) 6.82 cos15/(M g) = 0.188
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