Steep safety ramps are built beside mountain highways to enable vehicles with defective brakes to stop safely, A truck enters a 750 ft ramp at a high speed vo and travels 540 ft in 6 s at constant decleration before its speed is reduced to vo/2.

Assuming the same constant deceleration, determine:
(a) the additional time required for the truck to stop
(b) the additional distance traveled by the truck.