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A man in a lift ascending with an upward...

A man in a lift ascending with an upward acceleration `a` throws a ball vertically upwards with a velocity `v` with respect to himself and catches it after `t_1` seconds. After wards when the lift is descending with the same acceleration `a` acting downwards the man again throws the ball vertically upwards with the same velocity with respect to him and catches it after `t_2` seconds?

A

3 sec

B

8 sec

C

4 sec

D

5 sec

Text Solution

Verified by Experts

The correct Answer is:
B
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AAKASH SERIES-MOTION IN A STRAIGHT LINE -PRACTICE EXERCISE
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  2. A packet is dropped from a balloon rising up with uniform velocity 9.8...

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  3. A body is projected vertically upwards with a velocity 'U'. It crosses...

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  4. A boy throws a ball in air in such a manner that when the ball is at i...

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  5. A stone is dropped freely while another thrown vertically downward wit...

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  6. A body thrown up with a velocity reaches a maximum height of 50 m. Ano...

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  7. A person in a lift which descends down with an acceleration of 1.8 m//...

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  8. A man in a lift ascending with an upward acceleration a throws a ball ...

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  9. The velocity of a body moving vertically up is 49 ms^(-1) at half the...

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  10. An object is projected vertically up from the earth’s surface with vel...

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  11. A body is thrown vertically up reaches a maximum height of 78.4 m. Aft...

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  12. A stone dropped from a cliff hits the ground in 4 sec. Height of the c...

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  13. A stone is dropped from a tower of height 200 m and at the same time a...

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  14. A stone is thrown vertically up at 20 m/s from a tower 80 m height. Th...

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  15. The weight of a body at earth's surface is W. At a depth half way to t...

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  16. A balloon rises with uniform velocity of 10 ms^(-1). When the balloon ...

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  17. The variation of velocity of a particle moving along a straight line i...

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  18. In the given v-t graph the distance travelled by the body in 5 seconds...

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  19. Acceleration-times graph of a body is shown. The corresponding veloc...

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  20. A man in a car at location Q on a straight highway is moving with spee...

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