Neco 2020 Physics Question 6

Practice objective / multiple choice question 6 from the 2020 Neco Physics examination.

Neco 2020 Physics Objective / Multiple Choice Medium Difficulty

Question 6 NECO • 2020 • PHYSICS • objective

If a police car equipped with a siren of unknown true frequency passes a stationary observer, the observer first hears a frequency of \(540\ \text{Hz}\) as the car approaches, and later hears \(460\ \text{Hz}\) as it recedes. Assuming the speed of sound is \(340\ \text{m s}^{-1}\) and that the car moves at a constant speed, determine the speed of the car in \(\text{m s}^{-1}\).

A. 31.5\\ \\text{m s}^{-1}

B. 25.0\\ \\text{m s}^{-1}

C. 22.8\\ \\text{m s}^{-1}

Correct Answer D. 27.2\ \text{m s}^{-1}

Correct Answer

Correct Option:

27.2\ \text{m s}^{-1}

This is Neco 2020 Physics Question 6. It is one of the objective questions from the 2020 Neco Physics examination.

Difficulty level: Medium .

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