A metal block of mass 10kg is dragged on a horizontal rough road with a constant speed of 5ms-1 If the coefficient of friction
between the block and the road is 0.5, the rate at which heat is generated in (Js-1) is
(A) 100
(B) 245
(C) 9.8
(D) 10
Answers
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Answer:
The answer is a option C
Answered by
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Answer:
Loss of energy per unit time =work done by frictional force in a unit time
Heat generated =μmgv
=0.4×100×10×5
=2000
=2kJ
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