Given, mass of ball 1,m1=2kg Mass of ball 2,m2=3kg u1=36km∕h=36×
5
18
m∕s=10m∕s u2=0 After collision, the two balls will stick together and their combined velocity be v. Now, by using law of conservation of momentum, m1u1+m2u2=(m1+m2)v ⇒v=
2×10+3×0
5
=4ms−1 ∴ Energy loss = Energy before collision (E2)−Energyaftercollision(E1) =(
