A motor cycle starts from rest and accelerates along a straight path at 2 m /s2. At the starting point of the motor cycle there is a stationary electric siren. How far has the motor cycle gone when the driver hears the frequency of the siren at 94% of its value when the motor cycle was at rest?
( Speed of sound = 330 ms -1)
As we learnt in
frequency of sound when source is moving towards the observer and observer is moving away from source -
- wherein
Speed of sound
Speed of observer
speed of source
Original frequency
apparent frequency
Suppose the moter cycle has travelled a distance S if velocity at that point
S = 98 mt
Correct option is 2.
Option 1)
This is an incorrect option.
Option 2)
This is the correct option.
Option 3)
This is an incorrect option.
Option 4)
This is an incorrect option.
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