Question

A stone is dropped from the top
of a tower of 125 m high into a
pond which is at base of the
tower. When will the splash be
heard at the top? (Given g = 10 m
s 2 and speed of sound - 340 m
5-1)​

Answer 1

Answer:

Speed of sound = 340 m/s; g=10 m/s2; u=0; h=125 m; t=?

h= ut+ 1/2 gt^2

125 = 1/2 * 10  * t^2

solving above we get,

=> t = 5s

Let t' be the time taken by sound to reach the top after splash

v= 340 m/s, h=125m, t'=?

t'= h/v = 125 / 340 = 0.37s

so, splash will be heard after t+t' = 5 + 0.37 = 5.37s