---
title: "A roller coaster car crosses the top of a circular loop-the-loop at twice the critical speed. What is the ratio of the normal force to the gravitational force?"
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date_modified: "2026-03-17T04:43:53+00:00"
---

# A roller coaster car crosses the top of a circular loop-the-loop at twice the critical speed. What is the ratio of the normal force to the gravitational force?

A roller coaster car crosses the top of a circular loop-the-loop at twice the critical speed. What is the ratio of the normal force to the gravitational force?

- **A.** \[\frac{F_n}{F_g} = 2\]
- **B.** \[\frac{F_n}{F_g} = 3\]
- **C.** \[\frac{F_n}{F_g} = 4\]
- **D.** \[\frac{F_n}{F_g} = 5\]
- **E.** None of these options.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/35710/*