Ohhhh, I got ya. We've never dealt with the differences between weight and mass, so typically when she says weight she means mass. Is there part of the problem that would actually require weight instead of mass?
Homework Statement
A 20kg child jumps in the air to try to shoot free throws while his older sister is practicing basketball. His center of mass is normally 30cm off the ground. The lowest he can get his center of mass is 20cm off the ground, and the highest he can get it before he can no...