Problem: A 40 ton truck loses it brakes and reaches the bottom of a hill with a speed of 77 mph. Fortunately there is a runaway truck ramp which is inclined at angle of 17 degrees to the horizontal.

Part A: Assuming no losses, what distance does the truck travel along the runaway truck ramp?

Part B: If instead of there being no losses, there is gravel on the runaway truck ramp that provides a constant force of 3240 pounds in the opposite direction of motion, what distance does the truck travel along the runaway truck ramp in this case?

I want help to find what distance the truck travels along the runaway truck ramp.