Question
Asked Oct 31, 2019
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A CD has a mass of 17 g and a radius of 6.0 cm. When inserted into a player. the CD starts from rest and accelerates to an angular velocity of 17 rad/s in 0.59 s. Assuming the CD is a uniform solid disk, determine the net torque acting on it.

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Expert Answer

Step 1

The torque acting on the CD disk,

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I is the moment of inertia of the disk and a is the angular acceleration

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Step 2

The moment of inertia of the solid disk is given as

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I 0.5mr 17 2 kg x(0.06m) =0.5x 1000 =3.06x10-5kgm2

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Step 3

The angular accelerati...

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angular velocity time 17rad/s 0.59s -28.81 rad/s

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Science

Physics

Rotational Mechanics

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