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A ball weighing 10g hits a hard surface ...

A ball weighing `10g` hits a hard surface vertically with a speed of `5m//s` and rebounds with the same speed The ball remains in contact with the surface speed The ball remains in contact with the surface for `0.01s` The average force exerted by the surface on the ball is .

A

100 N

B

10 N

C

1N

D

`0.1` N

Text Solution

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The correct Answer is:
B
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GRB PUBLICATION-FRICTION AND CIRCULAR MOTION -OBJECTIVE QUESTIONS ( only one choice is correct )
  1. A block of mass 0.1 is held against a wall applying a horizontal force...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  18. Two blocks A & B attached to each other by a mass-less spring, are kep...

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  19. In the shown arrangement if f(1),f(2) and T be the frictional forces o...

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  20. Chain of mass M length L kept on rough sphere. mu is coefficient of fr...

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