Question

In a collision, a 9 kg ball moving at 5 m/s transfers all of its momentum to a 3 kg ball. What is the velocity of the 3 kg ball after the collision if all momentum is conserved?

Answer 1

Answer:

15 m/s

Explanation:

m₁ = 9 kg, before collision: v₁ = 5 m/s, after collision: v₁' = 0

m₂ = 3 kg,  before collision: v₂ = 0, after collision: v₂' = ? (x)

Momentum conservation:

9 * 5 + 3 * 0 = 9 * 0 + 3 * x

45 = 3x

x = 45/3 = 15 m/s