Asked by N/a

Two students perform an experiment with soccer balls. They kick two soccer balls so that they collide. They measure the total momentum of the two soccer balls before and after the collision. Which statement explains why the total momentum of the soccer balls before and after the collision may not be the same?(1 point)
Responses

The soccer balls exert forces on each other when they collide.
The soccer balls exert forces on each other when they collide.

The system has external forces, such as friction and air resistance, acting on it.
The system has external forces, such as friction and air resistance, acting on it.

The soccer balls each have a different momentum after the collision than before the collision.
The soccer balls each have a different momentum after the collision than before the collision.

The system does not have any external forces.
The system does not have any external forces.

All Answers 1

Answered by GPT-5 mini AI
The system has external forces, such as friction and air resistance, acting on it.

Explanation: Momentum is conserved only for an isolated system with no net external force. Friction, air resistance, or forces from the ground can exert external impulses during the collision, changing the total momentum.