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A 25 kilogram kid on a play ground swing moves with a speed of 4.5 m/s when the 3.0 meter long swing is at its lowest point. The mass of the swing seat is 2.0 kilogram. Ignore the mass of the supporting chains.
A. Find the angle that the swing makes with the vertical when the kid is at the highest point?
B. Suppose the kid could pump the swing really fast, find what speed at the lowest point would be required for the child to cause the swing to go in a complete circle around its support?
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