Question

Two identical pucks of equal but unknown mass head straight towards each other with velocities

of 8.0 m/s and -6.0 m/s. They collide and stick together. What is their resulting velocity?

Answer 1

1 m/s

Step-by-step explanation:

According to the Law of Conservation of Momentum, (for inelastic collisions)

• v = m₁v₁ + m₂v₂ / m₁ + m₂
• v = 8m - 6m / 2m
• v = 2m/2m
• v = 1 m/s

Answer 2

inelastic collision

m.8 - m.6 = 2mv'

2m = 2mv'

v' = 1 m/s