Two trucks travel at the same speed. They are far apart on adjacent lanes and approach each other essentially head-on. One driver hears the horn of the other truck at a frequency that is 1.20 times the frequency he hears when the trucks are stationary. The speed of sound is 343 m/s. At what speed is each truck moving?
ty~!!!!!
The Doppler Effect physic question, Plz help!!!?
2009-06-03 2:48 am
回答 (1)
2009-06-03 3:41 am
✔ 最佳答案
Using the Doppler eq,f/fs = 1.2 = (343+V1)/(343 - V2)
and the fact that V1 = V2,
V1 = V2 = 343(1.2 - 1)/(1+1.2) = 31.18 m/s
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