Conservation of Momentum using Unit Vectors (5:29)
A 66.0 g ball is launched from a stationary NerdAPult on wheels. The total mass of the NerdAPult on wheels is 1,791 g. If the ball moves with a velocity of 351 i + 179 j cm/s right after launching, what is the velocity of the NerdAPult right after the ball is launched? This is an AP Physics C: Mechanics topic.
Content Times: 0:00 The Problem 1:30 Why Momentum is Conserved 2:27 Solving the problem 3:45 Solution without Unit Vectors 4:11 Why are these ratios the same?

