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Homework Help: Problem with Flywheel?

  1. Nov 25, 2007 #1
    The flywheel of a steam engine runs with a constant angular speed of a 149 rev/min. When the steam is cut off, the friction of the bearings and of the air brings the wheel to rest in 1.9 hours.
    a) assuming it is constant, what is the angular acceleration of the wheel?

    b) how many rotations will the wheel make before coming to rest?

    c) what is the tangential linear acceleration of the particle 49 cm from axis of rotation when the flywheel when it is turning at 74 rev/min?

    d) what is the magnitude of the total linear acceleration of the particle in the Part C?

    Can someone Please help me on this question, and walk me through the steps.
  2. jcsd
  3. Nov 25, 2007 #2


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    Homework Helper

    Do you know your rotational kinematic equations? For (a) you are trying to find the angular acceleration. Which equation has the three things you know (that would be initial and final angular speeds, time), so you can solve for angular acceleration?

    Be careful of your units, remember to convert them if necessary so they are consistent with each other.
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