皇冠足球体育

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Rotational kinematics

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Problem

A merry-go-round has an initial angular velocity of 10.2rpm. At the end of the ride, the brakes are applied, giving it a constant angular deceleration of 0.032rad/s2 as the ride slows to a stop.
A diagram shows a merry-go-round that rotates counterclockwise around a central axis.
Determine the angular velocity of the ride, in rad/s, after it has made two revolutions during the braking period.
Write the answer using two significant figures.
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0.75
rads