Newtons Third Law F9D2B6

1. **State the problem:** A swimmer pushes against the pool wall with both feet. We need to identify the reaction force according to Newton's Third Law. 2. **Recall Newton's Third Law:** For every action, there is an equal and opposite reaction. This means if the swimmer exerts a force on the pool wall, the pool wall exerts an equal and opposite force back on the swimmer. 3. **Identify the action force:** The swimmer pushes on the pool wall with their feet. 4. **Identify the reaction force:** By Newton's Third Law, the pool wall pushes back on the swimmer with an equal force but in the opposite direction. 5. **Analyze the options:** - A: The force of the pool wall pushing the swimmer away from the wall. This matches the reaction force. - B: The force of gravity pulling the swimmer down. This is unrelated to the swimmer pushing the wall. - C: The force of the swimmer's feet pushing on the pool wall. This is the action force, not the reaction. - D: The force of the water pushing against the swimmer's body. This is unrelated to the wall push. 6. **Conclusion:** The correct reaction force is option A. **Final answer:** A. The force of the pool wall pushing the swimmer away from the wall.