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Question

A car wheel is rotated to uniform angular acceleration about its axis. Initially its angular velocity is zero. It rotates through an angle θ1 in the first 2s. In the next 2 s, it rotates through an additional angle θ2, the ratio of θ2θ1 is

A
1
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B
2
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C
3
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D
4
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Solution

The correct option is C 3
Angular acceleration α = constant
θ=12αt2

θ1=12α(2)2

θ2+θ1=12α(4)2

θ2θ1=3

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