Question

A car is moving towards a high cliff. The car driver sounds a horn of the frequency 'f'. The reflected sound heard by the driver has a frequency of 2f. If 'v' is the velocity of sound then the velocity of the car, in the same velocity\ units, will be

• A. $\frac{v}{3}$
• B. $\frac{v}{4}$
• C. $\frac{v}{2}$
• D. $\frac{v}{\sqrt 2}$

Answer 1

Answer: (A)

$\frac{v}{3}$

Answer 2

If the reflected sound heard by the car driver has a frequency of 2f, and 'v' is the velocity of sound, then the velocity of the car will be $\frac{v}{2}$.