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Rotational kinetics of merry-go-round

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A horizontal 808 N merry-go-round is a solid disk of radius 1.56 m, started from rest by a constant horizontal force of 50.5 N applied tangentially to the edge of the disk. Find the kinetic energy of the disk after 2.96 s.

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A horizontal 808 N merry-go-round is a solid disk of radius 1.56 m, started from rest by a constant ...

Solution Summary

The rotational kinetics of a merry-go-round is discovered. The kinetic energy of the disk after 2.96s is found.

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Motion of merry-go-round before and after person jumps onto it

A disk-shaped merry-go-round of radius 2.63 m and mass 155 kg rotates freely with an angular speed of .667 rev/s. A 59.4 kg person running tangential to the rim of the merry-go-round at 3.38 m/s jumps onto its rim and holds on. Before jumping on the merry-go-round, the person was moving in the same direction as the merry-go-round's rim.

Calculate the initial and final kinetic energies of this system.

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