Why are the direction of angular velocity and acceleration on the rotating shaft in circular motion This is the problem I met in college physics It's really on the axis, not pointing to it
The definition of acceleration is LIM (t → 0) △ V / △ T, that is, the derivative of velocity with respect to time. You can try to make a particle turn a very small angle in circular motion and calculate) △ V / △ T. in this way, you can calculate the value of acceleration. The direction of acceleration can be described as follows: if there is an acceleration along the tangent direction, then the velocity