An elephant and a mouse would both have zero weight in gravity-free space If they were moving toward you with the same speed would they bump into you with the same effect Explain?

Answer 1

Weight is mass*gravity, in zero gravity objects have zero weight. But they still have mass! When one object bumps another they under go a collision. Which can be explained by transfer of energy or conservation of momentum. In the case of energy, KE=1/2mv2 the mouse and the elephant have different masses so therefore different kinetic energy. Or in terms of momentum (mass*velocity), again the mouse and elephant have different masses and therefore different momentums at the time of impact. Therefore the reaction you feel will be different.

Answer 2

Yes, they would. In gravity-free space, weight does not affect momentum or collision impact. Both the elephant and the mouse would bump into you with the same effect because their momentum is determined by their velocity and mass, not their weight.