Steep safety ramps are built beside mountain highways to enable vehi- cles with defective brakes to stop. A 10-ton truck enters a 15° ramp at a high speed vo = 108 ft/s and travels for 6 s before its speed is reduced to 36 ft/s. Assuming constant deceleration, determine (a) the magnitude of the braking force, (b) the additional time required for the truck to stop. Neglect air resistance and rolling resistance. Vo RAIL INES CROSS COUN TRY MOVERS 00 15°

Steep safety ramps are built beside mountain highways to enable vehi- cles with defective brakes to stop. A 10-ton truck enters a 15° ramp at a high speed vo = 108 ft/s and travels for 6 s before its speed is reduced to 36 ft/s. Assuming constant deceleration, determine (a) the magnitude of the braking force, (b) the additional time required for the truck to stop. Neglect air resistance and rolling resistance. Vo RAIL INES CROSS COUN TRY MOVERS 00 15°