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A car is moving at a speed of 72 km//h. ...

A car is moving at a speed of `72 km//h`. The diameter of its wheels is `0.5 m`. If the wheels are stopped in `20` rotations by applying brakes, calcualte the angular retardation produced by the brakes.

A

`-25.5 rad//s^2`

B

`-33.5 rad//s^2`

C

`- 29.5 rad//s^`2

D

`- 45.5 rad//s^2`

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SL ARORA-System of particles & rotational Motion-EXERCISE
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  2. A disc, initially at rest, starts rotating about its own axis/ with a ...

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  8. Which one is a vector quantity?

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  9. If force vector is along X-axis and radius vector is along Y-axis then...

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  15. An automobile engine develops 100 kW when rotating at a speed of 1800 ...

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  16. Angular momentum is

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  17. Which is a vector quantity

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  18. Dimensions of angular momentum are

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  19. Joule-second is the unit of

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  20. Under a constant torque, the angular momentum of a body changes from A...

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