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the speed limit for vehicle on a road is 100 km/hr.a policeman detects a drop of 20% in the pitch of horn of a car as it passes by him. is the policeman justified in punishing the car diver for crossing speed limit?

the speed limit for vehicle on a road is 100 km/hr.a policeman detects a drop of 20% in the pitch of horn of a car as it passes by him. is the policeman justified in punishing the car diver for crossing speed limit?

Grade:12

1 Answers

Abhishek Kumar
askIITians Faculty 255 Points
7 years ago
Frequency is directly related to pitch. So, pitch drop means apparent frequency has dropped by 20% or Apparent frequency = 0.8(Real Frequency)
Find the speed of the car.

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