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A block of mass 2kg rests on a rough inc...

A block of mass 2kg rests on a rough inclined plane making an angle of `30^@` with the horizontal. The coefficient of static friction between the block and the plane is 0.7. The frictional force on the block is

A

`9.8 N `

B

`0.7 xx 9.8 xx sqrt3 N`

C

`9.8 xx sqrt3 N`

D

`0.7 xx 9.8 N`

Text Solution

Verified by Experts

The correct Answer is:
A
f = Mg sin `30^(@)`
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GRB PUBLICATION-FRICTION AND CIRCULAR MOTION -OBJECTIVE QUESTIONS ( only one choice is correct )
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  2. A block of mass 2kg rests on a rough inclined plane making an angle of...

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  3. A block has been placed on an inclined plane . The slope angle of thet...

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  4. A body of mass 60 kg is dragged with just enough force to start movin...

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  5. Pushing force making an angle theta to the horizontal is applied on a ...

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  6. A block A of mass 2 kg rests on another block B of mass 8 kg which res...

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  7. A 40 kg slab rests on a frictionless floor . A 10 kg block rests on to...

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  8. A block of mass m lying on a rough horizontal surface of friction coef...

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  9. A block of mass 0.1 is held against a wall applying a horizontal force...

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  10. A lineman of mass 60 kg is holding a vertical pole . The coefficient o...

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  11. A ball weighing 10g hits a hard surface vertically with a speed of 5m/...

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  12. A heavy box of mass 20 kg is pulled on a horizontal surface by applyin...

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  13. A block takes a twice as much time to slide down a 45^(@) rough incli...

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  14. A block of mass 2 kg rests on a rough horizontal plank , the coefficie...

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  15. A block released from rest from the top of a smooth inclined plane of...

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  16. A block of mass 10 kg is sliding on a surface inclined at 30^(@) with ...

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  17. A block of mass 6 kg is being pulled by force 24 N as shown . If coeff...

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  18. Coefficient of static friction between the two blocks in Fig. 7.124 is...

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  19. In Fig.7.125, coefficient of friction between m(1) and m(2) is mu and ...

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  20. If, in Q.19, coefficient of friction between m(1) and the wall is mu,a...

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