A car passes three posts P, Q and R, on a straight horizontal road. The distance PQ=50mPQ = 50\text{m}PQ=50m. The distance QR=100mQR = 100\text{m}QR=100m. The car, moving with constant acceleration, takes 2 seconds to travel from P to Q and 3 seconds to travel from Q to R.
Find the acceleration of the car.
Find the speed of the car at the instant it passes Q.
