A flat puck (mass M) is revolved in a circle on
Chapter 5, Problem 5.68(choose chapter or problem)
A flat puck (mass M) is revolved in a circle on a frictionless air hockey table top, and is held in this orbit by a massless cord which is connected to a dangling mass (mass m) through a central hole as shown in Fig. 5–46. Show that the speed of the puck is given by \(v = \sqrt {mgR/M}\).
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