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A ball hangs from a string inside a rail...

A ball hangs from a string inside a rail road car moving along a straight track. The string is observed to be inclined towards the rear of the car making a constant small angle with the vertical. It shows that the car is

A

moving with a uniform acceleration

B

moving with a uniform retardation

C

moving with a uniform retardation

D

moving with an acceleration which is increasing uniformly

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The correct Answer is:
A
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AAKASH SERIES-LAWS OF MOTION-EXERCISE - I
  1. A particle is observed from two frames S1 and S2. .the frame S2 moves ...

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

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  3. A ball hangs from a string inside a rail road car moving along a strai...

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  4. A vessel containing water is given a constant acceleration a towards t...

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  5. A cork and a metal bob are connected by a string as shown in the figur...

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  6. A satellite in force free space sweeps stationary interplanetary dust...

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  7. A constant force(F) is applied on a stationary particle of mass 'm'. T...

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  8. A constant force (F) is applied on a stationary particle of mass m, th...

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  9. You are on a frictionless horizontal plane . How can you get off if no...

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

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  11. A force of constant magnitude starts acting on a moving particle when ...

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  12. A bird of mass 0.1 kg rising vertically with an acceleration 0.2 ms^(-...

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  13. The force exerted by the floor of an elevator on the foot of a person ...

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  14. A satellite can be in a geostationary orbit around the earth at a dist...

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  15. a) In a frame of reference S1( though the net force is zero, the net a...

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  16. Statement A : Action and reaction act on two different bodies Stat...

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  17. Statement A : When a person is on the floor of a lift which is at rest...

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  18. A man of mass m is on the floor of a lift. The lift moving up with acc...

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  19. A man of mass m is on the floor of a lift. The lift moving up with acc...

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  20. A person of mass m is on the floor of a lift. The lift is moving down ...

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