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[Post New]30 Mar 2008 15:30:02 IST
    Subject: Re:19.A box of mass 2kg is pulled with uniform velocity on rough surface through a distanc
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uday_zingtudor (931)

Blazing goIITian

Olaaa!! Perrrfect answer. 155  [233 rates]
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work done on the block is converted to heat energy.

net force acting on the body is zero since the body is movin' with uniform velocity.

The frictional force acting on the body is N and the heat energy liberated is msdeltaT


Work done is Nd=ms(T) where d is distance covered and T is change in temp.

Plug in those values and u'll get the ans as b 0.039
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