angular momentum and kinetic energy of a system

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a 35kg child is sitting on the edge of an 80kg disc, with a radius of 2.5m. the disc and the child are spinning at 0.1 revolutions per second about an axis through the centre of the disc. the moment of inertia for a disc is (1/2)MR^2 and the child can be treated as a point mass.
a) calculate the total angular momentum and kinetic energy of the system.
b) a 6kg cat jumps from out of a tree onto the edge of the disc. what is the final kinetic energy of the cat, the child, and the disc? what was the change in total kinetic energy?

Answers (1)

  • JamesD6132
    Rating:5 stars

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