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QAIPMT-2009-Ph-2171: NEET 2009 Physics - Class 11 AIPMT-2009-Ph-2171 Solution: A bus is moving with a speed of \(10\ {ms}^{-1}\) on a straight …
A bus is moving with a speed of on a straight road. A scooterist wishes to overtake the bus in 100 s. If the bus is at a distance of 1 km from the scooterist with what speed should the scooterist chase the bus?
Multiple Choice Options
- A 555.5 Hz
- B 720 Hz
- C 500 Hz
- D 550 Hz
Step-by-Step Verified Solution
Car is the source and the hill is observer. Frequency heard at the hill, _ 1
_ _ 1 = _ _ v ( v _ V ) = 600 _ 330 330 _ 30
Now for reflection, the hill is the source and the driver the observer.
_ _ 2 = _ 1 _ ( 330 + 30 ) 330
_ _ 2 = 600 _ 330 300 _ 360 330 _ _ 2 = 720 Hz.