posted by THABAN on .
A 0.04KG BEAD SLIDES ON A CURVED STARTING FROM REST AT POINT A.THE EARTH FROM A AND B IS FRICTIONLESS ,WHILST THE PATH FROM B TO C IS ROUGH.IF THE BEAD ARRIVES AT POINT C WITH A SPEED OF 1M/S DERTIMINETHE AMOUNT OF WORKDONE BY THE FRICTIONAL FORCE IN PASSING FROM B TO C?
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Additional information is required on the elevation drop from A to C. Call it H.
The work done BY friction will be MINUS the difference between potential energy loss and kinetic energy gain
= M [gH - V^2/2)]