A ball of mass is dropped from the top of a tower of height . Simultaneously, a bullet of mass is fired from the foot of the tower upward with velocity of . At what time will the bullet and ball meet?
A bus covers first half distance between two station at a speed of and remaining half distance between two station at speed of . The average speed of the bus is –
A ball dropped from a building of height . If ball describes during its last second of fall, then the height of the building , and the time of fall are: