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A policeman chasing a bicycle with speed 22m/s and emitting sound of frequency 176 Hz . And both are going towards a stationary source of frequency 165 hz,then find out the speed of bicycle if it doesn`t heard any beat.

A policeman chasing a bicycle with speed 22m/s and emitting sound of frequency 176 Hz . And both are going towards a stationary source of frequency 165 hz,then find out the speed of bicycle if it doesn`t heard any beat.

Grade:11

1 Answers

Khimraj
3007 Points
3 years ago
Let n1 = frequency of police car horn heard by observer
n2 = frequency of stationary source heard by observer
v = velocity of bicycle
Then
n1 = [(330-v)/(300-22)]*176
n2 = [(330+v)/(300)]*165
n1 – n2 = 0
Sov = 22m/s.
Hope it clears. If you like answer then please approve it.

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