Q8: Prb 8 - Both being soft clay, they naturally stick together. What is their final velocity in meters per second?

Question

Consider that a clay model of a kangaroo has a mass of 0.225 kg and moves on ice at a speed of 0.55 m/s. It crashes into another clay model, which is initially motionless and has a mass of 0.34 kg.

Answer 1

m₁v₁ = (m₁ + m₂)v; v = 0.225kg·0.55m/s/(0.225kg + 0.34kg) = 0.219 m/s