A stone dropped from the top of a tower of height 300 m

cbse
waves

#1

A stone dropped from the top of a tower of height 300 m in 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${{s}^{-1}}$? (5=9.8 m${{s}^{-2}}$)


#2

Given, h = 300 m, g = 9.8 m/${{s}^{2}}$, v = 340 m${{s}^{-1}}$

$t_{ 2 }$ = time taken to reach top of the tower
= h/v = 300/340 = 0.885
Total time t = time to hear splash of sound =
$t_{ 1 }$ +$t_{ 2 }$ =7.82 + 0.88 = 8.705