Question

Starting from rest, a 12-cm-diameter compact disk takes 3.2 s to reach its operating angular velocity of 2500 rpm . Assume that the angular acceleration is constant. The disk's moment of inertia is 2.5×10−5kgm2.

How much torque is applied to the disk?

How many revolutions does it make before reaching full speed?

Answer #1

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Starting from rest, a 12-cm-diameter compact disk takes 2.7 s to
reach its operating angular velocity of 2300 rpm . Assume that the
angular acceleration is constant. The disk's moment of inertia is
2.5×10−5kgm2.
Part A) How much torque is applied to the disk?
Part B) How many revolutions does it make before reaching full
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b. Find the moment of inertia of the disk.
c. Find the net torque on the disk.

a flywheel of diameter 37.5 cm starts from rest and
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A computer hard disk 8.0 cm in diameter is initially at rest. A
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a. Through how many revolutions does a frisbee
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