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A ball is dropped from the top of a towe...

A ball is dropped from the top of a tower of height 78.4 m Another ball is thrown down with a certain velocity 2 sec later. If both the balls reach the ground simultaneously, the velocity of the second ball is

A

29.4 m/s

B

26.4 m/s

C

30 m/s

D

41.6 m/s

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The correct Answer is:
A
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AAKASH SERIES-MOTION IN A STRAIGHT LINE -PRACTICE EXERCISE
  1. A body is thrown up with a velocity 29.23 ms^(-1) . The distance trave...

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  2. Two balls are dropped simultaneously from two points separated by a ve...

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  3. A ball is dropped from the top of a tower of height 78.4 m Another bal...

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  4. A body is projected with a velocity 60 ms^(-1) vertically upwards the ...

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  5. A body is thrown vertically upwards with initial velocity 'u' reaches ...

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  6. A body is thrown vertically up with certain velocity. If h is the maxi...

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  7. A bullet fired vertically up from the ground reaches a point in its pa...

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  8. A body is projected vertically up with a velocity of 58.8 m/s. After 3...

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  9. The distance travelled by a body during last second of its upward jour...

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  10. A packet is dropped from a balloon rising up with uniform velocity 9.8...

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

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

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

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

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

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  16. A body projected up with a velocity of 39.2 m/s reaches a point in its...

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

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  18. A stone projected vertically up with velocity v from the top of a towe...

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

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

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