Two balls collide head-on on a table. The first ball has a mass of 0.50 kg and an initial velocity of 12.0 m/s. The second ball has a mass of 0.75 kg and an initial velocity of - 16.0 m/s. After the collision, the first ball travels at a velocity of - 21.6 m/s. What is the velocity of the second ball after the collision? Assume a perfectly elastic collision and no friction between the balls and the table.

A. 6.4 m/s

B. 11.3 m/s

C. 17.8 m/s

D. 21.6 m/s

Question

Zander Frazier

Physics

4 November, 08:01

Two balls collide head-on on a table. The first ball has a mass of 0.50 kg and an initial velocity of 12.0 m/s. The second ball has a mass of 0.75 kg and an initial velocity of - 16.0 m/s. After the collision, the first ball travels at a velocity of - 21.6 m/s. What is the velocity of the second ball after the collision? Assume a perfectly elastic collision and no friction between the balls and the table.

A. 6.4 m/s

B. 11.3 m/s

C. 17.8 m/s

D. 21.6 m/s

+4

Answers (1)

Know the Answer?

Giles · Answer 1

A is correct according to below calculation.

m₁v₀₁+m₂v₀₂=m₁v₁+m₂v₂

((m₁v₀₁+m₂v₀₂) - m₁v₁) / m₂=v₂

v₂ = ((.5*12-.75*16) + (.5*21.6)) /.75

v₂=6.4 m/s