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To keep a particle moving with constant ...

To keep a particle moving with constant velocity on a frictionless horizontal surface an external force

A

Should act continuously

B

Should be a variable force

C

not necessary

D

Should act opposite to the direction of motion

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The correct Answer is:
C
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AAKASH SERIES-LAWS OF MOTION-EXERCISE - I
  1. The limiting friction between two surfaces depends

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  2. A block 'B' rests on 'A'. A rests on a horizontal surface 'C which is ...

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  3. To keep a particle moving with constant velocity on a frictionless hor...

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  4. Frictional force between two bodies

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  5. If man is walking, direction of friction is

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  6. On a frictionless horizontal surface , assumed to be the x-y plane ,...

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  7. Car tyres are made of rubber and not of iron because

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  8. Aeroplanes are streamlined to reduce

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  9. It is easier to pull a lawn roller than to push it because pulling

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  10. A uniform rope of length l lies on a table . If the coefficient of fri...

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  11. In case of pulling & pushing minimum forces required (w sin alpha)/(co...

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  12. A body is moving in a circular orbit. It is just about to slide to the...

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  13. Adjoining figure shows two blocks A and B pushed against the wall with...

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  14. A body is just supported at the face of a cart moving at an accelerati...

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  15. A wooden block sliding down from the top of a smooth inclined plane st...

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  16. The angle which the rough inclined plane makes with the horizontal whe...

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  17. When the angle of inclination of on inclined plane is theta, an object...

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  18. In a situation the contact force by a rough horizontal surface on a bo...

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  19. A scooter starting from rest moves wilth as constant acceleration for ...

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  20. A block of mass m is connected to another block of mass M by a string....

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