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

Question

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

Explanation / Answer

mass m = 70.3 kg initial speed u = 6.1 m / s final speed v = 11.3 m / s the work done by the net external force acting on the skier W= ( 1/ 2) m [ v ^ 2 - u ^ 2 ]                                        W = 0.5 * 70.3 * [ 11.3^2 -6.1^2]                                             = 3180.372 J

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