An air puck of mass m 1 is tied to a string andallowed to revolve in a circle of

Question

An air puck of mass m1 is tied to a string andallowed to revolve in a circle of radius R on africtionless horizontal table. The other end of the string passesthrough a small hole in the center of the table, and a load of massm2 is tied to the string. The suspended loadremains in equilibrium while the puck on the tabletop revolves. a) Qualitatively describe what will happen in the motion ofthe puck if the value of m2 is somewhatincreased by placing an additional load on it. b) Qualitatively describe what will happen in the motion ofthe puck if the value of m2 is insteaddecreased by removing a part of the hanging load. a) Qualitatively describe what will happen in the motion ofthe puck if the value of m2 is somewhatincreased by placing an additional load on it. b) Qualitatively describe what will happen in the motion ofthe puck if the value of m2 is insteaddecreased by removing a part of the hanging load.

Explanation / Answer

The centripetal force T =m1v2 / R .....2 From 1 and 2 we get                  m1v2 / r = m2g                          v = (m2gR / m1) a) From the above relation we can say that if the massm2 increases the velocity of puck also increases. b) The velocity of the puck decreases.                             

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