Q1. A ball of mass m is dropped from a building of height h. At the same time another ball of mass 2 , m is thrown upwards from its base such that it hits the falling ball at mid-point. The speed with which the heavier ball is thrown is
- (1) √(2gh)
- (2) √(gh)
- (3) √((gh)/(2))
- (4) 1/2√(gh)