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The motor of an engine is rotating about...

The motor of an engine is rotating about its axis with an angular velocity of 100 rpm. It comes to rest in 15 s, after being switched off. Assuming constant angular deceleration, what are the numbers of revolutions made by it before coming to rest ?

A

12.5

B

40

C

32.5

D

15.6

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The correct Answer is:
A
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CHHAYA PUBLICATION-CIRCULAR MOTION-EXERCISE (MULTIPLE CHOICE QUESTIONS )
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  6. The angular velocity of a particle,vec(w) = 3 hat(i) - 4 hat(j) + hat(...

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  7. The ratio of angular speeds of minute hand and hour hand of a watch is

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  8. A particle of moves with constant angular velocity in a circle. During...

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  9. The angular speed of a flywheel making 360 revolutions per minute is

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  10. A car moves on a circular road. It describes equal angles about the ce...

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  11. A wheel of radius R rolls on the ground with a uniform velocity v. the...

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  12. The angle with which a cyclist leans with the horizontal while turning...

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  13. While taking a turn on a plane horizontal road, a car can skid due to

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  14. A car is moving along a horizontal circular path of radius 10 m at a u...

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  15. If maximum and minimum tension in the string whirling in a circle of ...

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  16. Coefficient of friction between the road and the tyre of a car is 0.6....

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  17. A body is moving in a circular path with centripetal acceleration a . ...

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  18. A ball of mass 0.12kg is being whirled in a horizontal circle at the e...

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  19. A car is moving in a circular horizontal track of radius 10 m with a c...

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  20. The motor of an engine is rotating about its axis with an angular velo...

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