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If angular velocity of a disc depends an...

If angular velocity of a disc depends an angle rotated `theta` as `omega=theta^(2)+2theta`, then its angular acceleration `alpha` is :

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The correct Answer is:
D

Distance covered by :
train I `=("Area of "Delta)_("train I")=200 m`
train II `=("Area of "Delta)_("train II")=80 m`
So the seperation `=300-(200+80)=20 m`
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ALLEN -KINEMATICS-EXERCISE-02
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