Lets Hear It For New York

This isn't the best quality picture, but it is a great application for the unit we are going to be learning, momentum. This past week, I was in the East Coast for college tours. This particular picture was taken when we first arrived in New York and we were on the Air Train. Momentum is defined as the quantity of motion of a moving body, measured as a product of its mass and velocity. The equation would look like this p = mv. Let's say the mass of the Air Train is about 50 tons which is equivalent to about 45,359 kg and its velocity is about 20 mph which is equivalent to about 9 m/s. To find the momentum at the given moment, we would simply multiply 45,359 kg with 9 m/s. The product is 408,231 N.