A water-skier is being pulled by a tow rope attached to a boat. As the driver pu

Question

A water-skier is being pulled by a tow rope attached to a boat. As the driver pushes the throttle forward, the skier accelerates. A 70.3-kg water-skier has an initial speed of 6.10 m/s. Later the speed increases to 11.3 m/s. Determine the work done by the net external force acting on the skier. A water-skier is being pulled by a tow rope attached to a boat. As the driver pushes the throttle forward, the skier accelerates. A 70.3-kg water-skier has an initial speed of 6.10 m/s. Later the speed increases to 11.3 m/s. Determine the work done by the net external force acting on the skier.

Explanation / Answer

apply Wnet = change in KE + change in PE

W = 0.5 * m ( vf^2-Vi^2)

W = 0.5 * 70.3* (11.3^2-6.1^2)

W = 3180.372 Joules

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