The work required to lift the chain is:
The work needed to lift the 500 lbs of coal is
The work needed to lift the chain and the coal is then:
This is in foot-pounds
I've attached it. Again in this problem we aren't given a spring constant or a force so I have no idea how I'd set up the problem to find WORK when I don't have the variables needed to find work. I thought maybe it'd be the (incorrect) answer I chose because 3 would just be the force, but obviously as I already partially knew this isn't the case.
Could someone point me in the right direction?