Question

If you are standing next to the road, why does the pitch of the siren of police car change as it comes toward you?

• A. Relative velocity changes as its angle with respect to you changes as the police car approaches you .
• B. Speed of sound increases
• C. The pitch is constant until the ambulance passes by
• D. The pitch seems to changes, due to changing in air pressure

Answer 1

The correct option is A

Relative velocity changes as its angle with respect to you changes as the police car approaches you .

Relative velocity changes as its angle with respect to you changes as the police car approaches you .