- #1

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(a) Find the magnitude of the force exerted by the worker.

(b) Find the work done on the block by the workers force.

(c) Find the work done on the block by the weight of the block.

I found the answer to (a) by sin(arcsin(.48/1.2)) * 9.81 * 36 kg which is 141.2629.

I don't know what to do for (b) and (c). My first guess would be that (b) is -141.2629 and (c) is 141.2629. But im not sure.