A student of mass 55kg stands at the edge of a circular platform

A student of mass 55kg stands at the edge of a circular platform that rotates about a frictionless vertical axel at constant angular speed of 2.o rad/s. The platform has a mass of 100kg and a radius of .0m. After riding the platform for a while the student jumps off.A) Find the angular speed of the platform without the studentB) Find the kinetic energy of the system before and after.Explain the result

 

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