Momentum is a very confusing topic for me, especially when you talk about change in momentum (impulse) versus change in speed. It is hard for me to tell the difference. In this picture a football player is getting tackled into the ground. The whole way down after he is hit there is no impulse but once he begins to hit the ground the impulse has a big small force and a large contact time, that is the same as if he his a hard surface because there would be a great force over a small contact time, they balance out. Overall he has a large momentum because has has a large mass and a large velocity moving forward.
No comments:
Post a Comment