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A racing car moving towards a cliff, sou...

A racing car moving towards a cliff, sounds its horn. The driver observes that the sound reflected from the cliff has a pitch one octave higher than the actual sound of the horn. If `v` is the velocity of sound, then the velocity of the car is

A

`(v)/(2)`

B

`(v)/(sqrt(2))`

C

`(v)/(4 )`

D

`(v)/(3)`

Text Solution

Verified by Experts

The correct Answer is:
D
In case of reflection from a stationary cliff,
`f.=((v+v_0)/(v-v_0))f = 2f " " therefore v_0 = (v)/(3)`
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