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Q.

A fly wheel is accelerated uniformly from rest and rotates through 5 rad in the first second. The angle rotated by the fly wheel in the next second, will be:

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a

20 rad 

b

15 rad 

c

7.5 rad

d

30 rad

answer is B.

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Detailed Solution

θ1=122×11=5   rad

α=10  rad/sec2

So, θ2=12×α2×21=15rad

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