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Q.

The moment of inertia of an angular wheel shown in figure is 3200 kgm2. If the inner radius is 5 cm and the outer radius is 20 cm, and the wheelis acted upon by the forces shown, then the angular acceleration of the wheel is

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a

10-1 rad/s2

b

10-2 rad/s2

c

10-3 rad/s2

d

10-4 rad/s2

answer is C.

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Detailed Solution

τ = Iα  ⇒ 10×20100+9×20100-12×20100 = 3200α⇒α = 10-3 rad/s2
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