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A lead ball dropped into a lake from a d...

A lead ball dropped into a lake from a diving board 5m above the water hits the water with certain velocity and then sinks to the bottom with the same constant velocity. If it reaches the bottom in 3s after it is dropped the depth of the lake is

A

30m

B

15m

C

10m

D

20m

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Verified by Experts

The correct Answer is:
D
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AAKASH SERIES-RIVISION EXERCISE-MOTION IN A STRAIGHT LINE (VERTICAL MOTION)
  1. A ball dropped from a point P crosses a point Q in t seconds. The time...

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  2. Two balls are dropped from the same height at two different places A a...

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  3. A lead ball dropped into a lake from a diving board 5m above the water...

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  4. A body P is thrown vertically up with velocity 30 ms^(-1) and anothe...

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  5. A boy sees a ball go up and then down through a window 2.45 m high. If...

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  6. A particle is projected vertically up and another is let fall to meet ...

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  7. A ball is projected from the bottom of a tower and is found to go abov...

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  8. A stone is dropped from a height of 10cm above the top of a window 80 ...

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  9. If a stone dropped from the top of a tower travels half of the height ...

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  10. A body initially at rest is moving with uniform acceleration a. Its ve...

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  11. A parachutist drops freely from an aeroplane for 8s before the parachu...

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  12. Two balls are projected simultaneously with the same speed from the to...

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  13. An object falls from a bridge that is 45 m above the water. It falls d...

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  14. The distance travelled by a body moving along a line in time t is prop...

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  15. Two bodies begin a free fall from the same height at a time interval o...

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  16. A ball is thrown vertically upwards from the top of a tower. Velocity ...

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  17. If water drops are falling at regular time intervals from ceiling of h...

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  18. When a stone falling from the top of vertical tower has fallen a dista...

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  19. A stone falls freely under gravity. It covers distance h1, h2 and h2. ...

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  20. A body is thrown vertically upward from a point 'A' 125 m above the gr...

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