121 A body of mass m was slowly hauled up the hill Fig 1 29 by a force F which at each point was directed along a tangent to the

Question

121 A body of mass m was slowly hauled up the hill Fig 1 29 by a force F which at each point was directed along a tangent to the trajectory Find the work performed by this force if the height of the hill is h the length of its base 1 and the coefficient of friction k buy 122 A disc of mass m 50 g slides with the zero initial velocity down an inclined plane set at an F Fig 1 29

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