---
title: "A car is safely negotiating an unbanked circular turn at a speed of 17 m/s on dry road. However, a long wet patch in the road appears and decreases the maximum static frictional force to one-fifth of its dry-road value. If the car is to continue safely around the curve, to what speed must the driver slow the car?"
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url: "https://nerd-notes.com/ubq/21009/"
date_modified: "2025-04-09T02:03:05+00:00"
---

# A car is safely negotiating an unbanked circular turn at a speed of 17 m/s on dry road. However, a long wet patch in the road appears and decreases the maximum static frictional force to one-fifth of its dry-road value. If the car is to continue safely around the curve, to what speed must the driver slow the car?

A car is safely negotiating an unbanked circular turn at a speed of \(17 \, \text{m/s}\) on dry road. However, a long wet patch in the road appears and decreases the maximum static frictional force to one-fifth of its dry-road value. If the car is to continue safely around the curve, by what factor would the it need to change the original velocity?

- **A.** \[ \frac{1}{3}v \]
- **B.** \[\frac{1}{2}v \]
- **C.** \[\frac{2}{7}v \]
- **D.** \[\frac{4}{9}v \]
- **E.** \[ \frac{3}{8}v \]

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/21009/*