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 83.9-kg water-skier has an initial speed of 6.3 m/s. Later, the speed increases to 10.1 m/s. Determine the work done by the net external force acting on the skier.

Question

Would I use the equation

KEf-KE0 = 1/2mvf^2 - 1/2mv0^2 ?

Answer 1

work = change in Ke
= (1/2) m (V2^2 - V1^2)

Answer 2

so I did (1/2)(83.9)(10.1-6.3) and got 159.41 J.Is this correct?

Answer 3

Disregard question.