$2$ Explain why we will use thecylindrical coordinate.

Determine the cylindrical components of the velocity and acceleration of the horse when

$t=2s.$ A horse on the merry$-$go$-$ro $\text{'}$nd moves according to the equations $r=8ft,=$

$(0\mathrm{.}6t)$ rad, and $($th

The piston of the hydraulic cylinder gives pin A a constant

velocity $v=1\mathrm{.}5\frac{m}{s}$ in the direction shown for an interval of

its motion. For the instant when $=60,$ determine $r^{},r^{},{}^{},$

and ${}^{},$ where $r\frac{?}{b}=ar(OA)$