A different scaffold that weighs 400 N supports two painters, one 500 N and the other 400 N. The reading in the left scale is 800 N. What is the reading in the right-hand scale

500 N

Explanation:

Given that,

The upward force is 800 N and the downward forces are 400 N, 500 N, 400 N.

At equilibrium, the upward forces will become equal to the downward forces. Let the reading in the right hand scale.

x + 800 = 400 + 500 + 400

x + 800 = 1300

x = 1300 - 800

= 500 N

So, the reading in the right hand scale is 500 N.

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