- NOTE: The last integral isn't right! We didn't account for the fact that there was an additional 1 meter of distance through which to pump the water, so our distance in the end should have been x+4 and not x+3!
- The physics definition of work and how to use integration to compute work if force and/or distance are not constant
- Hooke's Law (the force exerted by a spring is proportional to the displacement)
- Work done by pumping water out of variously shaped vessels
- Work done pulling a rope of linear density up a building
