a stone is dropped from roof of building takes 5 seconds to reach the ground the sound of striking is heard after 5.4 second of the stone is dropped the velocity of sound is
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120
u=0,a=-10,t=5(in stone's downward journey)
[S=ut+1/2at^2]=putting values we get (S=125)
bcus air friction is not consider
so,
for sound we easily put
Speed=Distance/Time
as whole time=5.4
so in upward journey of sound the time taken is=.4sec
so by solving:
Velocity of sound=125/.4
we get,
ANSWER=312.5
[S=ut+1/2at^2]=putting values we get (S=125)
bcus air friction is not consider
so,
for sound we easily put
Speed=Distance/Time
as whole time=5.4
so in upward journey of sound the time taken is=.4sec
so by solving:
Velocity of sound=125/.4
we get,
ANSWER=312.5
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