---
title: "An \\( 80 \\, \\text{kg} \\) block is placed \\( 2 \\, \\text{m} \\) away from the endpoint of a horizontal steel beam of length \\( 6.6 \\, \\text{m} \\) and mass \\( 1,450 \\, \\text{kg} \\). The plank makes contact with a vertical wall on one end, and the other endpoint is attached to a massless cable that makes an angle of \\( 30^\\circ \\) with the horizontal and ties into the vertical wall as well. Calculate the magnitude and direction of the force between the cable and the wall and of the force between the steel beam and the wall."
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url: "https://nerd-notes.com/ubq/39104/"
date_modified: "2026-01-10T22:09:30+00:00"
---

# An \( 80 \, \text{kg} \) block is placed \( 2 \, \text{m} \) away from the endpoint of a horizontal steel beam of length \( 6.6 \, \text{m} \) and mass \( 1,450 \, \text{kg} \). The plank makes contact with a vertical wall on one end, and the other endpoint is attached to a massless cable that makes an angle of \( 30^\circ \) with the horizontal and ties into the vertical wall as well. Calculate the magnitude and direction of the force between the cable and the wall and of the force between the steel beam and the wall.

An \( 80 \, \text{kg} \) block is placed \( 2 \, \text{m} \) away from the endpoint of a horizontal steel beam of length \( 6.6 \, \text{m} \) and mass \( 1,450 \, \text{kg} \). The plank makes contact with a vertical wall on one end (assume it does not slip).  The other end of the beam is attached to a massless cable that makes an angle of \( 30^\circ \) with the horizontal and ties into the vertical wall as well. Calculate the (1) tension force in the cable and (2) the total force the wall exerts on the beam.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/39104/*