Question

The puck in Figure 10.24 has a mass of 0.120 kg. The distance of the puck from the center of rotation is originally 39.5 cm, and the puck is sliding with a speed of 80.0 cm/s. The string is pulled downward 18.0 cm through the hole in the frictionless table. Determine the work done on the puck. (Suggestion: Consider the change of kinetic energy.)

Answer 1