# Questions tagged [rotation]

Circular motion about a central point or axis

675 questions
Filter by
Sorted by
Tagged with
51 views

### Are rotation matrices tensors?

Are rotation matrices tensors? If no, why? I'm not sure about it, for example considering the $z$-axis rotation matrix when I rotate the coordinate system the rotation matrix around the old $z$-axis ...
47 views

### Rate of angular momentum at the center of mass

I'm currently trying to calculate the Zero Moment Point for a game I develop, however im terrible at physics and therefore have trouble calculating the “rate of angular momentum at the center of mass”....
29 views

### The units when calculating Gyroscopic precession rate don't make sense [on hold]

I was doing a problem set for my physics course and I ran into some odd units for calcualting the gryeoscopic precession rate. As it is the angular velocity of the wheel around the axis, it should be ...
38 views

### Intermediate axis theorem in higher dimensions

The intermediate axis theorem states that the rotation of an object around its first and third principal axes is stable, while rotation around its second principal axis (or intermediate axis) is not. ...
18 views

### Does direction of angular velocity/acceleration have any physical implications?

when first learning about the angular velocity/acceleration, the right hand rule is mentioned. According to it, the direction of angular velocity/acceleration is along the axis perpendicular to the ...
30 views

### How would I go about solving for the magnitude of the force the pivot exerts on the bar?

Assuming the bar Is uniform in density. My idea was: since the system is in both translational and rotational equilibrium. $T\sin\theta = F$ (Pivot on Bar) Solving for $T$ let M = mass of bar let ...
54 views

127 views

### A rod rotating about a pivot

A long, uniform rod of length L and mass M is pivoted about a frictionless, horizontal pin through one end. The rod is nudged from rest in a vertical position as shown in figure. At the instant the ...
29 views

### Does acceleration of the rim mean just tangential or both tangential and centripetal acceleration?

On my physics homework, the problem specifies that the acceleration of the rim of a flywheel can't exceed 100g. Does this mean that the tangential acceleration only, or the sum of the tangential and ...
The tangential velocity of a particle in a rigid body is given by: $\vec{v}=\vec{\omega}\times \vec{r}$. Since the cross product is perpendicular to both $\vec{\omega}$ and $\vec{r}$, the velocity \$\...