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Which of the following is true ?...

Which of the following is true ?

A

Static friction is always greater than kinetic friction.

B

Friction can not accelerate a body in ground frame.

C

For identical surfaces in contact coefficient of static friction `gt `coefficient of sliding friction

D

Friciton is component of total contact force parallel to surface of contact.

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The correct Answer is:
C, D
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MOTION-NLM & FRICTION-EXERCISE-2(Level-II)
  1. A block of mass 1 kg is at rest relative to a smooth wedge leftwards ...

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  2. A wedge of mass m(1) and a block of mass m(2) are in equlibrium as sho...

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  3. As shown in figure two blocks A and B of mass 1kg each are connected b...

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  4. A block of mass 1 kg is placed on a rough wedge which is fixed on an e...

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  5. In the system shown in the diagram all surfaces are smooth, pulley and...

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  6. Two masses m(1)=4kg and m(2)=2kg are connected with an nextansible , m...

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  7. A block A of mass 7 kg is placed on a frictionless table. A thread tie...

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  8. In the system shown in the figure m(1) gt m(2). System is held at rest...

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  9. A lift starts moving down with 20 m//s^(2). Then which of the followin...

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  10. A particle slides down a smooth inclined plane of elevation theta fixe...

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  11. Which of the following is true ?

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  12. A block of mass 2.5 Kg is kept on a rough horizontal surface. It is fo...

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  13. NOT QUESTION

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  14. As shown in figure, A is a man of mass 60 kg standing on a block B of ...

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  15. In the figure, the blocks are of equal mass. The pulley is fixed. In t...

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  16. Two blocks A and B of equal mass m are connected through a massless st...

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  17. In the system of connected bodies in the adjoining figure. The surface...

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  18. Two blocks of masses m(1) and m(2) are connected through a massless in...

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  19. A long block A is at rest on a smooth horizontal surface. A small bloc...

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  20. Two blocks on a rough incline are connected by a light string that pas...

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