Answer:
Explanation:
mass of first ball, m1 = 0.5 kg
mass of second ball, m2 = 0.25 kg
initial velocity of first ball, u1 = 4 m/s
initial velocity of the second ball, u2 = - 3 m/s
Let v be the final velocity of the balls after collision
By use of conservation of momentum
m1 x u1 + m2 x u2 + ( m1 + m2) x v
0.5 x 4 - 0.25 x 3 = ( 0.5 + 0.25) x v
2 - 0.75 = 0.75 v
v = 1.67 m/s towards right.