---
title: "A child of mass \\( 3 \\) \\( \\text{kg} \\) rotates on a platform of \\( 10 \\) \\( \\text{kg} \\). They start walking towards the center while the platform is rotating. Which of the following could possibly decrease the total angular momentum of the child-platform system?"
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url: "https://nerd-notes.com/ubq/22825/"
date_modified: "2025-03-14T03:58:14+00:00"
---

# A child of mass \( 3 \) \( \text{kg} \) rotates on a platform of \( 10 \) \( \text{kg} \). They start walking towards the center while the platform is rotating. Which of the following could possibly decrease the total angular momentum of the child-platform system?

A child of mass \( 3 \) \( \text{kg} \) rotates on a platform of \( 10 \) \( \text{kg} \). They start walking towards the center while the platform is rotating. Which of the following could possibly decrease the total angular momentum of the child-platform system?

- **A.** The child walks towards the center of the platform.
- **B.** The child walks towards the edge of the platform.
- **C.** The child walks in a circle, opposite to the rotational direction of the platform.
- **D.** The child walks in a circle, along with the rotational direction of the platform.
- **E.** none of the above will change the total angular momentum of the system.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/22825/*