A cameraman standing at A is following the movement of a race car traveling at a speed of 30 m/s. Determine the angular rate (theta dot) at which the man must turn to keep the camera directed on the car at theta = 30 degrees.
b = 20 m
a = 20 m
theta = 30 degs
vr = r dot
vtheta = r*theta dot
The Attempt at a Solution
If only I knew r dot, I could figure this problem out.
I found r with the law of cosines (r = 34.641 m).
I was thinking of using
30 = sqrt( (rdot)^2 + r^2(thetadot)^2)
but I don't know r dot... where can I find the rate of change in r?
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