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A car of mass 1000 kg moves on a circula...

A car of mass 1000 kg moves on a circular track of radius 20 . If the coefficient of friction is 0.64, then the maximum velocity with which the car can move is

A

`22.4ms ^(-1)`

B

`5.6ms ^(-1)`

C

`11.2ms ^(-1)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
Given `mu` =0.64,r=20m
Maximum velocity of the car is given by
`v=sqrt(murg)=sqrt(0.64xx20xx10)`
`therefore" "v=sqrt(0.64xx200)`
`=sqrt128~~11.2ms^(-1)`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-CIRCULAR MOTION-EXERCISE 1
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  9. The coefficient of friction between the tyres and the road is 0.25. T...

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  10. A body moves along a circular path of radius 10m and the coefficient ...

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  11. body is just being revolved in a vertical circle of radius R with a ...

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  12. A railway carriager has its centre pf gravity at a height of 0.75m ab...

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  14. A body of mass 1 kg is rotating in a verticle circle of radius 1 m .Wh...

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  15. A stone of mass 1 kg is tied to a string 2m long and it's rotated at c...

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  16. In a loop ,a body starts at a height h =2R. The minimum speed with wh...

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  18. A mass m is attached to the end of a rod of length l. The mass goes al...

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  19. What should be the coefficient of friction between the tyres and the r...

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  20. The maximum speed with which a car driven round a curve of radius 18 m...

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