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July 25, 2014

Homework Help: physics

Posted by Mare on Wednesday, November 18, 2009 at 11:07pm.

A merry go round in the park has a radius of 1.8 m and a rotational inertia of 900 kg-m^2. A child pushes the merry go round with a constant force of 80 N applied at the edge and parrallel to the edge. A frictional torque of 12 Nm acts at the axle of the merry go round. What is the rotational acceleration of the merry go round if the child stops pushing after 15 seconds? How long will it take for the merry go round to stop turning?

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