---
title: "A runner pushes against the track to sprint forward. Which two action–reaction FORCE pairs are involved? Select two letters."
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url: "https://nerd-notes.com/ubq/100656/"
date_modified: "2025-09-11T04:26:46+00:00"
---

# A runner pushes against the track to sprint forward. Which two action–reaction FORCE pairs are involved? Select two letters.

A runner pushes against the track to sprint forward. Which two action–reaction FORCE pairs are involved? Select two letters.

- **A.** The runner pushes backward on the ground with her shoes.
- **B.** The ground pushes forward on the runner’s shoes.
- **C.** The runner’s muscles push her body forward.
- **D.** The runner pushes forward on the air in front of her.
- **E.** The ground pushes upward on the runner, balancing her weight.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/100656/*