Solving a problem in physics section 5 point 85 mechani

Solving a problem in physics section 5 point 85 mechani

85. A person weighing m = 60 kg, standing on the edge of the horizontal platform radius R = 1 m and a mass M = 120 kg, coasting about a fixed vertical axis with the frequency n1 = 10 min-1, it moves to the center. Assuming a uniform platform round disc, but a man - a point mass, determine the work done by the person in the transition from the edge of the platform to its center.

Additional information:

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)