---
title: "A seesaw is balanced on a fulcrum, with a boy of mass \\( M_1 \\) sitting on one end and a girl of mass \\( M_2 \\) sitting on the other end. The seesaw is a uniform plank of length \\( L \\) and mass \\( M \\). The fulcrum is located at the midpoint of the plank. Does \\( M_1 = M_2 \\)? Justify your working."
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url: "https://nerd-notes.com/ubq/22883/"
date_modified: "2025-12-22T08:25:32+00:00"
---

# A seesaw is balanced on a fulcrum, with a boy of mass \( M_1 \) sitting on one end and a girl of mass \( M_2 \) sitting on the other end. The seesaw is a uniform plank of length \( L \) and mass \( M \). The fulcrum is located at the midpoint of the plank. Does \( M_1 = M_2 \)? Justify your working.

A seesaw is balanced on a fulcrum, with a boy of mass \( M_1 \) sitting on one end and a girl of mass \( M_2 \) sitting on the other end. The seesaw is a uniform plank of length \( L \) and mass \( M \). The fulcrum is located at the midpoint of the plank. Does \( M_1 = M_2 \)? Justify your working.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/22883/*