An express train is moving with a velocity `v_1`. Its driver finds another train is movig on the same track in the same direction with velocity `v_2`. To escape collision, driver applies a retardation a on the train. The minimum time of escaping collision be

The driver of a train moving at 72 km h^(-1) sights another train moving at 4 ms^(-1) on the same track and in the same direction. He instantly applies brakes to produces a retardation of 1 ms^(-2) . The minimum distance between the trains so that no collision occurs is

The driver of a train moving at 72 km h^(-1) sights another train moving at 4 ms^(-1) on the same track and in the same direction. He instantly applies brakes to produces a retardation of 1 ms^(-2) . The minimum distance between the trains so that no collision occurs is

A car is moving with velocity vec v_(c) towards north and a train is moving towards east with velocity vec v_(t) . Find the direction of relative velocity of car with respect to train.

A car is moving with velocity vec v_(c) towards north and a train is moving towards east with velocity vec v_(t) . Find the direction of relative velocity of car with respect to train.