1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

# A stone is dropped from the top of a tower 500 m high into a pond of water at the base of the tower. When is the splash heard at the top? (Given g=10 ms−2 and speed of sound =340 ms−1)

A
10 s
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
11.47 s
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
1.10 s
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
20 s
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

## The correct option is B 11.47 sGiven - h=500m,g10m/s2,v=340m/s ,by , h=ut+(1/2)gt2 , 500=0+(1/2)10t2 , (initial velocity , u=0) ,or t2=1000/10=100 ,or t=10s ,it is the time taken by stone to reach the water level , after that a sound is produced due to strike of stone on water , and sound travels upwards .Let t' be the time taken by sound to reach the base of tower ,then , t′=h/v=500/340=1.47s ,therefore time taken by splash to hear at the top , T=t+t′=10+1.47=11.47s

Suggest Corrections
0
Join BYJU'S Learning Program
Related Videos
Echo tackle
PHYSICS
Watch in App
Explore more
Join BYJU'S Learning Program