[bill1952]

58.6 feet per second at 40MPH

A little over 10 seconds assuming no increase in speed during the fall...

[Fester Chugabrew]

. . . assuming no increase in speed during the fall . . .

Bet he had his foot on the break pedal.

[pelican001]

If you assume “assuming no increase in speed during the fall...” then he’d still be floating in the air at 600 ft.
“

[HardStarboard]

>>>assuming no increase in speed during the fall...<<<

Repealing the Law of Gravity? Even Obama hasn't attempted that!!

[Cooter]

Unless the car was launched at an angle, the horizontal speed of the car is not relevant to the vertical distance it fell.

The formula to use is d = 0.5 * g * t^2.
Solving for t would give sqrt(600 ft * 2 / 32 ft/sec^2)= 6.1 seconds.

In those 6.1 seconds the car would travel (6 sec) * (40 mi/hr) * (5280 ft/mi) / (3600 sec/hr) = 358 ft away from the canyon wall, assuming the canyon wall was vertical and the horizontal speed of the car remained constant.