---
title: "A pendulum consists of a small bob of mass \\(0.50\\text{ kg}\\) attached to the end of a light string of length \\(1.2\\text{ m}\\). The bob is pulled aside until the string is horizontal and taut, and then released from rest. As the bob swings downward through the lowest point of its circular path, what is the tension in the string?"
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url: "https://nerd-notes.com/ubq/120678/"
date_modified: "2026-08-23T04:42:38+00:00"
---

# A pendulum consists of a small bob of mass \(0.50\text{ kg}\) attached to the end of a light string of length \(1.2\text{ m}\). The bob is pulled aside until the string is horizontal and taut, and then released from rest. As the bob swings downward through the lowest point of its circular path, what is the tension in the string?

A pendulum consists of a small bob of mass \(0.50\text{ kg}\) attached to the end of a light string of length \(1.2\text{ m}\). The bob is pulled aside until the string is horizontal and taut, and then released from rest. As the bob swings downward through the lowest point of its circular path, what is the tension in the string?

![A schematic diagram showing a pendulum in two positions. At the top center, a small black dot represents a fixed pivot point attached to a horizontal hatched ceiling. Extending horizontally to the right from the pivot is a solid straight line of length \(L\), terminating in a solid black circle representing a bob of mass \(m\). A curved dashed arc with a downward-pointing arrowhead extends from this horizontal bob position down to the lowest vertical position directly below the pivot. At this lowest position, a second solid black circle is shown with a vertical solid line of length \(L\) connecting it back up to the pivot. A single right-pointing arrow labeled \(v\) is drawn horizontally tangent to the bob at the lowest point. A downward vertical arrow labeled \(g\) is shown in the upper left. No other labels, lines, text, or axes appear.](https://nerd-notes.com/wp-content/uploads/ubq-frq-generated/stem-fig-1-1787460158-X2XpIY.jpg)

- **A.** \(14.7\text{ N}\)
- **B.** \(19.6\text{ N}\)
- **C.** \(24.5\text{ N}\)
- **D.** \(29.4\text{ N}\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/120678/*