Question

stone is dropped from a height of 20 m into a well and the speed of sound is 360 meters per second as that place then the sound of splash is heard after a time g=10m/sec square​

Answer 1

Answer:

• stone is dropped from a height of 20 m into a well and the speed of sound is 360 meters per second as that place then the sound of splash is heard after a time g=10m/sec square

Answer 2

Answer:

Height of the tower S=500 m

Initial speed of the stone u=0

Acceleration due to gravity acting on the stone g=10m/s

2

Using S=ut

1

+

2

1

gt

1

2

where t

1

is the time taken by the stone to reach the lake.

∴ 500=0+

2

1

(10)t

1

2

We get t

1

=10 s

Speed of sound in air v=330m/s

Time taken by the sound of splash to reach the top of tower t

2

=

v

S

∴ t

2

=

330

500

=1.5 s

Thus total time after which the sound of splash will be heard t=t

1

+t

2

∴ t=10+1.5=11.5 s