A child of mass mc = 35 kg stands on the rim of a frictionless merry...

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Physics

A child of mass mc = 35 kg stands on the rim of africtionless merry go round, which acts like a solid disk of massmm = 55 kg and radius r = 1.1 m. With the merry go roundat rest, they throw a rock of mass mr = 1.0 kg with avelocity v = 18 m/s relative to the ground in a directionhorizontal to the ground, and tangent to the rim of the merry goround.

  1. What is the magnitude of the angular momentum of the rockaround the axis of the merry go round?
  2. What is the angular velocity of the merry go round after therock is thrown?
  3. One of the child’s friends holds their hand against the rim ofthe merry go round and causes it to stop in a time interval of 3.2s. What is the magnitude of the frictional force applied?

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