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A given object takes n times more time t...

A given object takes n times more time to slide down a `45^(@)` rough inclined planeas it takes to slide down a perfectly smooth `45^(@)` incline. The coefficient of kinetic friction between the object and the incline is :

A

`(1)/(2- n^2)`

B

`1 - (1)/(n^2)`

C

`sqrt(1 - (1)/(n^2))`

D

`sqrt((1)/(1-n^2))`

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The correct Answer is:
B
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AAKASH SERIES-LAWS OF MOTION-PRACTICE EXERCISE
  1. If the angle of inclination of the inclined plane is sin^(-1) ((1)/(2)...

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  2. A block rests on a rough inclined plane making an angle of 30^(@) with...

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  3. A given object takes n times more time to slide down a 45^(@) rough i...

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  4. A block sliding down a rough 45° inclined plane has half the velocity ...

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  5. A block is pushed up a rough inclined plane of 45°. If the time of des...

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  6. An object takes 1 second to slide down a rough 45^(@) inclined plane. ...

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  7. A body slides down a smooth plane starting from rest in 4sec. Time tak...

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  8. A block is lying on an inclined plane which makes an angle of 60^@ wit...

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  9. A 10sqrt3 kg box has to move up an inclined slope of 60^(@) to the hor...

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  10. The minimum force required to move a body up an inclined plane is thre...

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  11. A body of mass 10kg is on a rough inclined plane having an inclination...

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  12. A block of wood mass 5kg is placed on a plane making an angle 30^(@) w...

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  13. A body of mass 'm' slides down a smooth inclined plane having an incli...

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  14. A body is sliding down an inclined plane have coefficient of friction ...

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  16. Masses M(1), M(2) and M(3) are connected by strings of negligible mass...

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  17. A car of mass 1000 kg is moving with a speed of 40 ms^(-1) on a circu...

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  18. A cyclist rides round a curved path of radius 10m at a speed 18 kmph. ...

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