What is the acceleration of the car?

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What is the acceleration of the car?

A car is accelerating while its horn is blowing. Just after the car passes a stationary person, the person hears a frequency of 971 Hz. 19.9 seconds later, the frequency heard by the person has decreased to 914 Hz. When the car is stationary, its horn emits a sound whose frequency is 1020 Hz. The speed of sound is 343 m/s. What is the acceleration of the car? Assume that the velocity of the car is always in the positive direction.

2007-06-24 16:47:03 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics

2 answers

λ0 = 343/1020
λ1 = 343/971
λ2 = 343/914
∆v = (343/914 - 343/971)1020
a = (343/914 - 343/971)1020/19 = 1.1826 m/s^2

2007-06-24 17:16:20 · answer #1 · answered by Helmut 7 · 0⤊ 0⤋

60.456448964561664961978791916166 Mph.... any more questions?

2007-06-24 23:50:58 · answer #2 · answered by miamimix99 2 · 0⤊ 0⤋