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Ask iit jee aieee pet cbse icse state board experts Expert Question: Change in KE=?
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[Post New]21 Nov 2007 15:55:55 IST
    Subject: Re:Change in KE=?
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smarty.cool (7)

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i think answer is A
but doesnt the work done by internal forces is 0 for a continous body
so work done will become some of external +conservative +non-conservative forces acting on a body .
hope you got it. 
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[Post New]21 Nov 2007 18:11:09 IST
    Subject: Change in KE=?
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rooney (894)

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@Krishna sir

I am not applying any force on the body. It was initially moving with speed v on a rough surface. Then its k.e. becomes zero due to friction. Then, if we dont consider friction which is non-censervative, we cant account for change in K.E.
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