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Kaushik Ram Grade: 10
        A block slides down an inclined plane of slope angle ? with constant velocity. It is then projected up the same plane with an initial velocity 'u' . How far up the incline will it move before coming to rest?
6 years ago

Answers : (1)

vikas askiitian expert
510 Points
										

block moves down the plane with constant velocity it means net force is zero...


force due to friction (f) = mgsin@                              (@ is the angle of plane)


net retardation force when body is projected upward is (f+mgsin@)


 f = mgsin@ so


net retardation force = 2mgsin@


     ma = mgsin@


     a(retardation) = 2gsin@        .............1


 V2 = U2 - 2aS


finally velocity becomes 0 so


  U2 = 2aS


 S = U2/2a


    =u2/4gsin@

6 years ago
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