Ok, I need help with a basic collision problem. Please see the attached image and picture the image as a pendulum. You bring mass 'M' up a certain height and let it go. It collides elastically with mass 'Mew M." Mass 'm' goes up a maximum height. Find mass 'Mew M' so that mass 'm' can attain the maximum height. Also: (1) M Does not equal m. (2) The answer is not infinitely small, which is what i got .