1. The problem statement, all variables and given/known data http://www.math.rutgers.edu/~greenfie/mill_courses/math152/pdfstuff/w2.pdf problem 2 2. Relevant equations Work is the integral of force.. 3. The attempt at a solution Problem 2: Basically I know how to calculate the work for the cylinder. Since they have the same volume, we know the volume of the cones, but since they are the same depth underground, then how is the answer going to be different for any of these three. I know the work is the integral of the force, and the force is basically found by taking the volume * density * g...so why are they going to be different and how can I know? I also know it relates to distances from the center of mass to surface (i.e. one is 5m one is 2.5m and one is 7.5 m), but I'm not sure how I can apply this....I think I should use similar triangles, but I am a little unsure how to approach this.