JEE Main Physics question
A ball of mass 2 kg and another of mass 4 kg are dropped together from a 60 ft tall building. After a fall of 30 ft each towards earth, their respective kinetic energies will be in the ratio of
Answer: (C)
Solution
Both balls fall through the same height (30 ft) and therefore reach the same speed, so KE ∝ mass: ratio = 2:4 = 1:2.