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 84.6-kg water-skier has an initial speed of 5.8 m/s. Later, the speed increases to 11.2 m/s. Determine the work done by the net external force acting on the skier. W=

Answer 1

The work done by the net external force acting on the skier is 2172.176 J.

Step-by-step explanation:

The work done by a net external force can be calculated using the formula:

W = ½m(vf2 - vi2)

where W is the work done, m is the mass of the object, vf is the final velocity, and vi is the initial velocity.

Plugging in the given values:

W = ½(84.6 kg)((11.2 m/s)2 - (5.8 m/s)2)

W = 2172.176 J

Therefore, the work done by the net external force acting on the skier is 2172.176 J.