Question
Asked Nov 28, 2019
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A 1450 kg disc with radius 3.0 m is rotating at 1500 rev/min when an 925 m·N braking torque is applied to the wheel. How long does it take for the disk to come to rest?

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Expert Answer

Step 1

Mass of the disc= 1450kg

Radius=3m

Angular velocity=1500rev/min

Step 2

Moment of  inertia of the circular disc about its center.

1M
I =
М
2
1
-x 1450kg x 9m
2
1 6525kgm2
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1M I = М 2 1 -x 1450kg x 9m 2 1 6525kgm2

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Step 3

As we know, that braking torque will produce deceleratio...

Г-1а
г
I
925Nm
a =
6525kg2
rad
a = 0.14
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Г-1а г I 925Nm a = 6525kg2 rad a = 0.14

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