- #1
cragar
- 2,552
- 3
It seems that centripetal acceleration should be in the same direction as the velocity vector.
Why is it directed into the center of the circle. I remember walter lewin talking about a marble inside a glass test tube. Imagine the marble inside of it and I swing the test tube like a baseball bat horizontal to the ground. When i first start to swing the bat i push the marble with the side of the test tube and the marble wants to go in a straight line, and the reason it goes out towards the end is because when i move the test tube, I have allowed the marble moving in a straight line to occupy the end of the test tube. So why is the acceleration into the center of the circle.
Why is it directed into the center of the circle. I remember walter lewin talking about a marble inside a glass test tube. Imagine the marble inside of it and I swing the test tube like a baseball bat horizontal to the ground. When i first start to swing the bat i push the marble with the side of the test tube and the marble wants to go in a straight line, and the reason it goes out towards the end is because when i move the test tube, I have allowed the marble moving in a straight line to occupy the end of the test tube. So why is the acceleration into the center of the circle.