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A block of mass m lying on a rough horiz...

A block of mass `m` lying on a rough horizontal surface of friction coefficient `mu` is pulled by a force `F` as shown , the limiting friction between the block and surface will be

A

`mu` mg

B

`mu [ "mg" - (sqrt3 //2)F]`

C

`mu [ "mg" - (F//2)]`

D

`mu [ "mg" + (F//2)]`

Text Solution

Verified by Experts

The correct Answer is:
C
`f_(L) = mu N " " [N = "Mg" - (F)/(2)]`
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GRB PUBLICATION-FRICTION AND CIRCULAR MOTION -OBJECTIVE QUESTIONS ( only one choice is correct )
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  6. A ball weighing 10g hits a hard surface vertically with a speed of 5m/...

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

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

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

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

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

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

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

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

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  16. The rear side of a truck is open and a box of 40 kg mass is placed 5 m...

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  17. Three blocks are kept as shown in figure Acceleration of 20 kg block w...

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  18. Two block of masses m1 and m2 are connected with a massless unstretche...

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  19. Two thin roads are moving perpendicularly as shown in the figure. If t...

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  20. Wedge is fixed on horizontal surface. Block A is pulled upward by appl...

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