- #1
Anony-mouse
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Homework Statement
A radar at rest emits microwaves at a frequency of 1.63 GHz onto a truck moving away from the radar. There is a frequency difference between the received and sent frequencies of 281 Hz. What is the velocity of the truck?
Homework Equations
f(obs)=f(sent)*[(v+/-observer velocity)/(v+/-source velocity)]
The Attempt at a Solution
(1.63e9 Hz + 281 Hz) = (1.63e9 Hz)*((343 m/s - X)/(343 - 0))
(((1.63e9 Hz + 281 Hz)*343) / 1.63e9 Hz) - 343 m/s = X
X=5.91e-5 m/s
but because that answer was ridiculous, I redid the question with 3e8 m/s as my V), which gave X=49.88 m/s, but that was wrong too.