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Problem 6: Radar gun A police car is at rest parallel to the highway and measures the speed of cars. It sends the signal with a frequency of 1200 Hz, it bounces off the moving car (it is traveling toward or away from the signal emitted) and the radar gun measures the frequency of the signal received. For one car suspected of speeding the received frequency was 1100 Hz. The speed of sound is approximately 350 m/s (note our radar gun uses sound waves rather than electromagnetic waves) a) How fast was the car moving? b) Was it moving towards or away from the police car? c) The police car follows it by moving towards the suspicious car with the speed police 50m/s What is the frequency the radar gun is measuring now?

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0 As observed frequency is smaller than the original frequedly, so it ing away from police care using Doppler is formula was

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