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A mass M slides downward along a rough plane surface inclined at angle to the horizontal. Initially the mass has a speed Vi b

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Answer #1

a)

since workdone due to friction is negative so, power corresponding to workdone must be negabative.

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b)

positive

c)

workdone due to normal force is zero

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Comment before rate in case any doubt, will reply for sure.. goodluck

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