Use Pythagoras and your given info to set up the problem and find the rate
at which the driver is going.
The hypoteneuse of the triangle formed is length 3/2 and dD/dt=-136.
dy/dt=0 because the chopper is at a constant height of y=1.
Since y=1 and D=3/2, then use Pythagoras to find the horizontal distance
the car is from the chopper.
The chopper is flying at 120 if we label that side of the triangle x and let
dx/dt=120. The trick is noting that the chopper and the car are
approaching one another. The chopper at dx/dt=120 and the car at, say, dz/dt=?
That is what must be found.
That depends. What's the speed limit and how hard-nosed is the cop?.Should the driver of the car be given a ticket for speeding?