Q1. A stone is thrown vertically upward with a speed of 12.3 m/s from the edge of a cliff 84.6m high. What is the speed just before hitting?
Q2. A train 500m long is moving on a straight track with a speed of 82.6 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 15.3 km/h. assume constant acceleration; find out how long the train blocked the crossing. Disregard the width of the crossing.