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A stone dropped into a lake form a tower...

A stone dropped into a lake form a tower 500 m high. The sound of splash is heard after

A

10s

B

11.5s

C

14s

D

21s

Text Solution

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The correct Answer is:
B
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A stone is dropped from the top of a tower 500 m high into a pond of water at the base of the tower. When is the splash heard at the top? Given, g= 10 m s^-1 and speed of sound = 340 m s^-1 .

A stone is dropped from the top of a tower 100m high. At the same time another stone is thrown vertically upwards from the ground with a velocity of 50 ms^-1 . Find when and where the stones will meet.

A stone is allowed to fall from the top of a tower 100 m high and at the same time another stone is projected vertically upwards from the ground with a velocity of 25 m/ s. calculate when and where the two stones will meet.

An observer 1.5m tall is 30metres away from a tower,50m high.Determine the angle of elevation from his eyes to the top of the tower.

A rain drop of radius 2 mm falls from a height of 500 m above the ground. It falls with decreasing acceleration (due to viscous resistance of the air) until at half its original height, it attains its maximum (terminal) speed, and moves with uniform speed thereafter. What is the work done by the gravitational force on the drop in the first and second half of its journey? What is the work done by the resistive force in the entire journey if its speed on reaching the ground is 10 m s-^1 ?

A stone is dropped from a rising balloon at a height of 75 m above the ground. It reaches the ground in 6 seconds. Calculate the velocity of the balloon just at the moment when the stone is dropped.

A ball is dropped from the top of a tower. One second later another ball is thrown downwards with a velocity of 15ms^-1 . When and how far below the top will the second stone overtake the first?

From the top of a tower 100m in height, a ball is dropped and at the same time another ball is projected vertically upwards from the ground with a velocity of 25ms^-1 . Find when and where two balls will meet.

The angle of elevation of the top of a hill at the foot of the tower is 60° and the angle of elevation of the top of a tower from the foot of the hill is 30°.If the tower is 50m high, find the height of the hill.

A stone is released from the top of a tower of height 19.6 m. Calculate its final velocity just before touching the ground.

BINA LIBRARY-KINEMATICS - 1-EXERCISE
  1. A particle is moving with a velocity 5m/s towards east and its velocit...

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  2. A body falling from a height travels 40 m in the last 2s of its fall t...

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  3. A stone dropped into a lake form a tower 500 m high. The sound of spla...

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  4. The velocity of a body depends on time according to v = 20 + 0.1t^2 . ...

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  5. If X = at + bt^2 , where X is distance travelled by a body in km while...

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  6. The equation sqrtx = t+9 gives the variation of displacement with time...

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  7. A body starts from rest. The ratio of the distances travelled by it du...

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  8. A body is released from a height and falls freely. Another body is rel...

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  9. A body dropped from a height h with an initial speed zero reaches the ...

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  10. Water drops fall at regular intervals from a tap, which is 5 m above t...

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  11. A train 150 m in length is moving north at a speed of 10m/s. A parrot ...

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  12. For a body moving along a straight line, the average velocity is equal...

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  13. If the time-displacement graph of a particle is parallel to time-axis,...

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  14. When a particle is moving with uniform velocity which of the following...

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  15. The distance covered by a body moving along a straight line is proport...

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  16. If a body starts from rest and travels 1.2 m in 8th second , then acce...

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  17. The equation sqrtx = t+9 gives the variation of displacement with time...

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  18. If X = at + bt^2 , where X is distance travelled by a body in km while...

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  19. A body is released from the top of a tower of height h meters. It take...

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  20. The distances travelled by a body falling freely from rest in the 1st,...

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