An 800-n billboard worker stands on a 4.0-m scaffold supported by vertical ropes at each end. scaffold weighs 500-n and the worker stands 1.0 m from one end, what is the tension in the rope farther from the worker? (a) 1300 n (b) 1800 n (c) 450 n (d) none of these.

Explanation and

This problem is best answered by drawing a figure as a first step.

ABC is the scaffold.

A downward force of 500N is applied downwards at 1m from end A.

The weight of 800N is exerted by the scaffold uniformly distributed between A & C.

At A and C, ropes are attached to support the load.

Let Fc=tension in rope passing through C.

Take moments about A:

Fc = (500N * 1m +800N*(3+1)/2m / 4m

    = (500 Nm + 1600Nm) / 4m

    = 2100 Nm / 4m

   = 525 N

it breaks and dirupture other materials and other sencews from the bottom

b.a device that inputs heat into a cool object