A shell of mass 3 kg explodes in to two fragments of 1 kg and 2 kg. The ratio of momenta of the fragments and the ratio of the kinetic energy of the fragments (lighter ∶ heavier) are respectively:
1
1 ∶ 1 and 2 ∶ 1
2
1 ∶ 1 and 4 ∶ 1
3
1 ∶ 1 and 1 ∶ 2
4
2 ∶ 1 and 4 ∶ 1