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.
- What is the magnitude of the angular momentum of the rockaround the axis of the merry go round?
- What is the angular velocity of the merry go round after therock is thrown?
- 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?
