a stone is dropped from the top of the tower 750 M height into a point of water at the base of the tower when is a Splash here the top?(given
g=10ms
speed of sound=340ms)
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s = 750 m = distance to travel - for the stone
g = 10 m/sec/sec, initial velocity of stone u = 0
equation of the dynamics of stone :
s = u t + 1/2 g t^2
750 = 0 + 1/2 * 10 * t^2
t = 12.24 sec
Immediately after touching the water, in a fraction of second, there is a sound wave produced on the surface of water - splashing of water.
time for sound to reach the top = distance to travel / speed =
750 meter / 340 m/sec = 74 / 34 sec
total time = 12.24 sec + 75 / 34 sec
= 14.44 sec ^2 approx
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