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A block of weight W is suspended from th...

A block of weight W is suspended from the mid-point of a rope whose ends are at the same horizontal level. The force required to straighten the rope is

A

W

B

2W

C

W/2

D

infinitely large

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The correct Answer is:
D
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AAKASH SERIES-LAWS OF MOTION-EXERCISE - I
  1. A ball falls towards the earth. Which of the following is correct?

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  2. A man is standing in the middle of a perfectly smooth 'island of ice' ...

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  3. A block of weight W is suspended from the mid-point of a rope whose en...

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  4. Figure shows a heavy block kept on a frictionless surface and being pu...

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  5. A body of weight w1 is suspended from the ceiling of a room through a...

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  6. The apparent weight of a body

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  7. The apparent weight of a freely falling body is

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  8. A lift is ascending with a constnat speed V. A passenger in the lift d...

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  9. A block of mass m can slide on a smooth inclined plane of inclination ...

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  10. An elevator is moving vertically upward with an acceleration of g . Th...

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  11. A lift is going up with uniform velocity. When brakes are applied, it...

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  12. If the tension in the cable supporting an elevator is equal to the wei...

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  13. A relerence frame atteched to the Earth

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  14. A stationary railway platform on earth is

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  15. A rotating platform for a stationary observer outside, it is

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  16. Frames moving uniformly with respect to an inertial frame are

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  17. If particle stays at rest as seen from a frame of reference

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  18. The acceleration of a particle is found to be non zero while no force ...

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  19. A particle is observed from two frames S1 and S2. .the frame S2 moves ...

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  20. A particle is found to be at rest when seen from a frame S(1) and movi...

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