---
title: "An object of unknown mass is acted upon by multiple forces. 100N to the right at 20°, 400N to the left at 40° below the horizontal, and 500N to the right at 10° below horizontal. The coefficients of friction are μs=0.6 and μk=0.2. Starting from rest, the object travels 10 meters in 4.5 seconds. What is the mass of the unknown object?"
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url: "https://nerd-notes.com/ubq/29525/"
date_modified: "2025-09-15T03:45:50+00:00"
---

# An object of unknown mass is acted upon by multiple forces. 100N to the right at 20°, 400N to the left at 40° below the horizontal, and 500N to the right at 10° below horizontal. The coefficients of friction are μs=0.6 and μk=0.2. Starting from rest, the object travels 10 meters in 4.5 seconds. What is the mass of the unknown object?

An object of unknown mass is acted upon by multiple forces:

- \(100 \, \text{N}\) to the right at \(20^\circ\)
- \(400 \, \text{N}\) to the left at \(40^\circ\) below the horizontal
- \(500 \, \text{N}\) to the right at \(10^\circ\) below the horizontal

The coefficients of friction are \(\mu_s = 0.6\) and \(\mu_k = 0.2\). Starting from rest, the object travels \(10 \, \text{m}\) in \(4.5 \, \text{s}\). What is the mass of the unknown object?

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/29525/*