Recent content by Tylemaker

I saw a freight train cruising by today and thought "The momentum of that thing must be mind-blowing". I only have high school physics and thus couldn't calculate the momentum including many external forces. Did some quick research and was wondering what the momentum of an 80 car freight train...

1. The problem I have trouble understanding slope and area on graphs. For a force as a function of time graph the area is equal to the impulse. Why is that? And what is the slope equal to? How do I know?2. Homework Equations p=mv fΔt=mΔv 3. The Attempt at a Solution So the slope should be...

So does this simply cause lower air pressure at the front of the vehicle or could it potentially create a vacuum at the front of the vehicle?

When we are sitting in our cars, and the car begins accelerating we are "pushed back" due to acceleration. Or if you have a ball in an empty vehicle, when it starts accelerating, the ball will roll to the back of the car. I was wondering, is this also true in air? If there is an...