Final answer:
To calculate scaffold tensions and wall bracing forces, apply equilibrium conditions and Newton's laws. Determine the total force due to wind and divide by the number of braces for the wall forces.
Step-by-step explanation:
The question involves understanding equilibrium conditions and applying Newton's laws in mechanics. For the scaffold, the equilibrium of forces requires that the sum of the torques around any pivot point is zero. This can be used to calculate the tensions in the cables supporting the scaffold.
To find the mass of the painting equipment, the tension forces and the weight of the painter can be used. For the wall bracing, the force exerted by each of the 10 braces must counteract the horizontal force due to the wind on the wall, which requires determining the total force exerted by the wind and dividing it by the number of braces.
The entire wall absorbs the wind's force over its area, then this total force is countered by the 10 braces equally. With a horizontal force of 650 N per square meter, the force on the wall can be found, which when divided by 10 braces gives the force each brace exerts.