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Homework Help: Mechanics problem

  1. Sep 22, 2004 #1
    Can anyone please please please :cry: help?

    A flywheel initially rotating at a speed of 800 rev/min, is brought to rest with uniform angular deceleration in 6 secs.

    a. How many revolutions does the flywheel make before coming to rest?

    b. Determine the magnitude and direction of the resultant linear acceleration of a point A on the flywheel 0.2s before coming to rest. Draw a vector diagram showing the magnitude and direction of the resultant linear acceleration and its radial and tangentail components. A is positioned at a fixed radius of 160mm from the axis of rotation.

    c. At what time will both the radial and tangential components of acceleration be equal in magnitude.

    :cry: :cry: :cry:
  2. jcsd
  3. Sep 22, 2004 #2
    What have you done up till now ???
  4. Sep 23, 2004 #3
    Part a.

    I make it 40 revolutions
    I cant do part c because I cant do part b
  5. Sep 23, 2004 #4
    The question asks you to make a diagram (which you should do anyway). So why not make one? Or try?
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