hi. I'm fairly new at physics but i got put in AP Physics and i think i could make it with some help. Could anybody please explain how to solve this problem? A speed trap is set with 2 pressureactivated strips placed across a highway, 110 m apart. A car is speeding along at 33 m/s, while the speed limit is 21 m/s. At the instant the car activates the first strip, the driver begins slowing down. What minimum deceleration is needed in order that the average speed is within the limit by the time the car crosses the second marker?