## Conceptual Physics (12th Edition)

Published by Addison-Wesley

# Chapter 2 - Think and Solve: 29

300 N.

#### Work Step by Step

The scaffold is in equilibrium, and the sum of the forces on it is zero. The upward forces are 400 N + 400 N, and the downward forces are 500 N and the weight w of the scaffold. $$400 N + 400 N - 500 N - w = 0$$ $$w = 300 N$$

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