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A police car moving at 22 m//s, chase a ...

A police car moving at `22 m//s`, chase a motoclist. The police man has horn at `176 H_(Z)`, While both of them move towards a stationary siran of frequency `165 H_(Z)`. Calulate the speed of the motorcyclist, if he does not observer any beats. (velocity of sound in air `= 330 m//s)`

A

33m/s

B

22m/s

C

zero

D

11m/s

Text Solution

Verified by Experts

The correct Answer is:
B
`f_1` = requency of the police can heard by motorcyclist,
`f_2`= frequency of the siren heard by motorcyclist
`f_1=(330-v)/(330-22)xx176, f_2=(330+v)/(330)xx165 therefore f_1-f_2=0implies v= 22 m//s`
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