Ball 1, with a mass of 100 g and traveling at 13.0 m/s, collides head on with ball 2, which has a mass of 340 g and is initially at rest. What are the final velocities of each ball if the collision is perfectly elastic? What are the final velocities of each ball if the collision is perfectly inelastic?

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A head-on, an elastic collision occurs between two billiard balls of equal mass. If a red ball is traveling to the right with speed v and a blue ball is traveling to the left with speed 3v before the collision, what statement is true concerning their velocities subsequent to the collision? Neglect any effects of spin.

The red ball travels to the left with speed v, while the blue ball travels to the right with speed 3v.
Their final velocities cannot be determined because momentum is not conserved in the collision.
The velocities cannot be determined without knowing the mass of each ball.
The red ball travels to the left with speed 3v, while the blue ball travels to the right with speed v.
The red ball travels to the left with speed v, while the blue ball continues to move to the left with a speed of 2v.

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A head-on, elastic collision occurs between two billiard balls of equal mass. If a red ball is traveling to the right with speed v and a blue ball is traveling to the left with speed 3v before the collision, what statement is true concerning their velocities subsequent to the collision? Neglect any effects of spin.

The red ball travels to the left with speed v, while the blue ball travels to the right with speed 3v.
Their final velocities cannot be determined because momentum is not conserved in the collision.
The velocities cannot be determined without knowing the mass of each ball.
The red ball travels to the left with speed 3v, while the blue ball travels to the right with speed v.
The red ball travels to the left with speed v, while the blue ball continues to move to the left with a speed 2v.