The sketch shows a painter’s scaffold in mechanical equilibrium. The person in the middle weighs 500 N, and the tensions in each rope are 400 N. What is the weight of the scaffold?

Solution: The below figure shows the middle the person standing weights is 500 N, The tension in the each rope is 400 N, We need to find the weight of the scaffold We see there is a total tension of each rope is 400 N + 400 N = 800 N 800 N pulling up and the total of 500 N + W pulling...