Question

A stone dropped from the top of a tower of height 300 m high splashes into the water of a pond near the base of the tower. When Is the splash heard at the top given that the speed of sound In air Is 340 m s^-1? (g= 9.8 ms^-2 )

Answer 1

Time taken to hear the splash at the top = Time taken by the stone to reach the pond + Time taken by the sound to travel to the top from the base of tower,

i e., T = T₁ + T₂ ……..(1)

T₁ : We know that s = u t + 1/2 a t²

u = 0, s = 300 m, a = g = 9.8 ms^-2