A block is launched up a frictionless ramp, as shown, with initial speed v_0. Th

Question

A block is launched up a frictionless ramp, as shown, with initial speed v_0. The block travels up the ramp and continues across the level section. List the forces exerted on the block after it has been launched, as it moves up the ramp. Which forces, if any, do non-zero work on the block? Which forces, if any, do zero work on the block? Write an expression for the net work done on the block from the bottom to the top of the ramp. Express your answer in terms of one or more of the following quantities: the weight mg of the block, the angle theta, and the height H of the ramp. Show your work.

Explanation / Answer

(a). Gravitational force

Normal reaction by frictiobless surface .

Work of gravitational force will be nonzero .

Work of normal reaction will be zero.

(b). Net work done = -mgh

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