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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−2 and speed of sound = 340 m s−1.

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Height of the tower, s = 500 m Velocity of sound, v = 340 m s−1 Acceleration due to gravity, g = 10 m s−2 Initial velocity of the stone, u = 0 (since the stone is initially at rest) Time taken by the stone to fall to the base of the tower, t1 According to the second equation of motion: Now,...
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Height of the tower, s = 500 m

Velocity of sound, v = 340 m s−1

Acceleration due to gravity, g = 10 m s−2

Initial velocity of the stone, u = 0 (since the stone is initially at rest)

Time taken by the stone to fall to the base of the tower, t1

According to the second equation of motion:

Now, time taken by the sound to reach the top from the base of the tower,

Therefore, the splash is heard at the top after time, t

Where,

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