3) A cart is moving toward another one at speed V. It collides without touching because of magnetic repulsion. Suppose that the interaction istotally elastic. How fast do they each move afterwards?

a) If the masses are equal?

b) If the target mass is much, much bigger?

c) If the target mass is twice as big?

d) If the target mass is much, much smaller?

e) If the target mass is half as big?