A stone is dropped from the top of the tower 500m 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 sq. and speed of sound = 340 m/s.

Answers (1)

The total distance the stone travels= 500m. After stone hitting the water surface sound has to travel 500 m to reach the top of the tower. So total time is taken = time taken by stone to travel down(t1)+time taken by sound to travel up (t2)

t=t_1+t_2=\sqrt{\frac{2s}{g}}+\frac{500}{v_s}=\sqrt{\frac{2\times500}{10}}+\frac{500}{340}=11.47sec

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