Recent content by Marwyn

Ya, but that resisting force is balanced by you pushing the book up isn't it?

oooh ok. So my only confusion has been that I assumed energy would be conserved as I raised the book? I assumed that the potential energy gained by the work done to raise the book should be offset by the negative work done by gravity. That's what I was confused about with irreversible...

There's something I'm not understanding about work done on a system with constant velocity. The total net work is zero right? Say two friends are pushing a block on opposite sides. One friend manages to dominate the other so they go in one direction. The floor is frictionless. The total work...