A speed ign motorcyclist sees traffic ha...

A speed ign motorcyclist sees traffic ham ahead of him. He slows doen to `36 km//h` He finds that traffic has eased and a car moving ahead of him at `18 km//h` is honking at a frequency of 1392 Hz. If the speed of sound is `343m//s`, the frequency of the honk as heard by him will be

1332 Hz

1372 Hz

1412 Hz

1454 Hz

Text Solution

Verified by Experts

The correct Answer is:

Frequency heard by motorcyclist
Source `(upsilon_(s))` and listener `(upsilon_(L))` both are moving along the same direction

`v' = ((upsilon + upsilon_(L))/(upsilon + upsilon_(S)))v`
`= ((343 + 10)/(343 + 5)) 1392` Hz
= 1412 Hz

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