Is angular acceleration the same as radial acceleration? Also, what is the equation for tangential acceleration? I just changed my original comment. The relevant equations are
\frac{d\mathbf{r}}{dt} = \dot r\hat{\mathbf{r}} + r\dot\theta\hat{\boldsymbol\theta}
\frac{d^2\mathbf{r}}{dt^2}...
Homework Statement
A particle moves outward along a spiral. Its trajectory is given by r=Aθ, where A is a constant. A=1/π m/rad. θ increases in time according to θ=αt^2/2, where α is a constant.
Show that the radial acceleration is zero when θ=1/√2 rad. At what angles do the radial and...