A metal ball of mass 2 kg moving with speed of 36 km/h has a head on collision with a stationary ball of mass 3 kg. If after collision, both the ***** move as a single mass, then the loss in K.E. due to collision is
(a) 100 J
(b) 140 J
(c) 40 J
(d) 60 J
Correct option (d) 60 J
Explanation:
Mass of metal ball = 2 kg;
Speed of metal ball (v1) = 36 km/h = 10 m/* and mass of stationary ball = 3 kg.
Applying law of conservation of momentum,
