# Normal and tangential acceleration

1. Jan 8, 2016

### werson tan

1. The problem statement, all variables and given/known data
why the normal acceleration is 6 rads^-1 ? It's not stated in the question , right?
Can someone explain more about normal acceleration? i couldnt understand it . I only know that when the rod is rotated , it has tangential acceleration

2. Relevant equations

3. The attempt at a solution

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2. Jan 8, 2016

### BvU

It's not stated in the question. But not in the solution either! Something has to keep G in a circular trajectory and that requires an acceleration $\ \omega^2 r.\ \ \$ That $\,\omega$ is given in the problem statement!

For the kinematics of rotational motion: this (only the comparison), that or any textbook ! Did I forget hyperphysics?

Last edited: Jan 8, 2016