10. If you lifted an 80kg rock onto a trailer that is 2.0 meters off the ground, what is the work done? Show your equation and work the same as in the lesson. 11. Two students try to move a heavy box. One pushes with a force of 80N while the other pulls with a force of 40N in the same direction. What is the work done by each boy after the box is moved 10 meters? Show your equation and work the same as in the lesson. 12. Two younger students try to move a heavy box. One pushes with a force of 20N while the other pulls with a force of 30N in the same direction. What is the work done by each boy after 10 seconds if the box can't be moved? Show your equation and work the same as in the lesson