---
title: "Two disks, A and B, each experience a net external torque that varies over an interval of \\( 5 \\) \\( \\text{s} \\). Disk B has a rotational inertia that is twice that of Disk A. The graph shown represents the angular momentum of the two disks as functions of time between \\( t = 0 \\) \\( \\text{s} \\) and \\( t = 5 \\) \\( \\text{s} \\). The average magnitudes of the net torques exerted on disks A and B from \\( t = 0 \\) \\( \\text{s} \\) to \\( t = 5 \\) \\( \\text{s} \\) are \\( \\tau_A \\) and \\( \\tau_B \\), respectively. Which of the following expressions correctly relates the magnitudes of the average torques?"
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url: "https://nerd-notes.com/ubq/88526/"
date_modified: "2025-11-09T06:53:35+00:00"
---

# Two disks, A and B, each experience a net external torque that varies over an interval of \( 5 \) \( \text{s} \). Disk B has a rotational inertia that is twice that of Disk A. The graph shown represents the angular momentum of the two disks as functions of time between \( t = 0 \) \( \text{s} \) and \( t = 5 \) \( \text{s} \). The average magnitudes of the net torques exerted on disks A and B from \( t = 0 \) \( \text{s} \) to \( t = 5 \) \( \text{s} \) are \( \tau_A \) and \( \tau_B \), respectively. Which of the following expressions correctly relates the magnitudes of the average torques?

Two disks, A and B, each experience a net external torque that varies over an interval of \( 5 \) \( \text{s} \). Disk B has a rotational inertia that is twice that of Disk A. The graph shown represents the angular momentum of the two disks as functions of time between \( t = 0 \) \( \text{s} \) and \( t = 5 \) \( \text{s} \). The average magnitudes of the net torques exerted on disks A and B from \( t = 0 \) \( \text{s} \) to \( t = 5 \) \( \text{s} \) are \( \tau_A \) and \( \tau_B \), respectively. Which of the following expressions correctly relates the magnitudes of the average torques?

![Diagram](https://nerd-notes.com/wp-content/uploads/2025/04/torquegrapgh2obj32ubq.png)

- **A.** \( \tau_B = 4 \tau_A \)
- **B.** \( \tau_B = 2 \tau_A \)
- **C.** \( \tau_B = \dfrac{1}{2} \tau_A \)
- **D.** \( \tau_B = \dfrac{1}{4} \tau_A \)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/88526/*