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

A child of mass m_c = 35 kg stands on the rim of a frictionless merry go round, which acts like a solid disk of mass m_m = 55 kg and radius r = 1.1 m. With the merry go round at rest, they throw a rock of mass m_r = 1.0 kg with a velocity v = 18 m/s relative to the ground in a direction horizontal to the ground, and tangent to the rim of the merry go round.

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

Expert Solution

genius_generous answered 1 year ago

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