The magnitude of the ball's momentum is greater after the batter hits the ball.

The magnitude of the ball's momentum is less after the batter hits the ball.

The magnitude of the ball's momentum is the same before and after the batter hits the ball.

The momentum of each object increases.

The momentum of each object decreases.

The momentum of the billiard ball increases, and the momentum of the marble decreases.

The total momentum before and after the collision is zero.

equal in magnitude and direction.

equal in magnitude and opposite in direction.

in the same direction but of different magnitudes.

in opposite directions but of different magnitudes.

the momentum of each object is conserved.

the total momentum of the system is zero.

the total momentum is conserved only if the objects move in opposite directions.

the total momentum is always conserved.

The total momentum of an isolated system is zero.

The total momentum of any system maintains a constant momentum.

Every object in an isolated system maintains a constant momentum.

The total momentum of an isolated system remains constant regardless of the forces between the objects in the system.

The total momentum of an isolated system could remain constant depending on the forces between the objects.

The momentum of the first ball doesn't change.

The momentum of the second ball doesn't change.

The total momentum of the system increases.

The momentum lost by the first ball is gained by the second ball.

10.5 m/s

5.25 m/s

21.0 m/s

0.0476 m/s

0.00 m/s

0.22 m/s towards the crowd

0.24 m/s towards the crowd

14 m/s towards the crowd

16 m/s towards the crowd

18 m/s towards the crowd

2.0 m/s east

1.9 m/s east

1.8 m/s east

1.7 m/s east

1.6 m/s east