Question 1When a ball of mass 2kg moving with a velocity of 10 ms-1 collides head-on with a ball of mass 3 kg, and both moves together after the collision, the common velocity is ___.A.5 ms-1 and energy is lostB.4 ms-1 and energy is lostC.2 ms-1 and energy is gainedD.6 ms-1 and momentum is gainedObjective Show full explanation