Alarge wooden turntable in the shape of a flat uniform disk has a radius of 2.00 m and a total mass of 100 kg . the turntable is initially rotating at 4.00 rad/s about a vertical axis through its center. suddenly, a 65.0-kg parachutist makes a soft landing on the turntable at a point near the outer edge.
1. find the angular speed of the turntable after the parachutist lands. (assume that you can treat the parachutist as a particle.)2. compute the kinetic energy of the system before and after the parachutist lands. why are these kinetic energies not equal?

Part 1)

Part 2)

initial kinetic energy of the system

Final kinetic energy is given as

Energy is decreased due to friction between parachutist and the disc

Explanation:

Part a)

As we know that the system of turn table and parachutist is isolated and there is no external force on this system

So here we can use angular momentum conservation for this

Part 2)

initial kinetic energy of the system

Final kinetic energy is given as

Energy is decreased due to friction between parachutist and the disc

i would say the answer is food.

hope this !

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