Point A of the circular disk is at the angular position $\backslash$theta $=0$ at time t$=0.$ The disk has angular velocity $\backslash$omega $\_(0)=0\mathrm{.}15$ra$($d$)/($s$)$ at t$=0$ and subsequently experiences a constant angular acceleration a$=2\mathrm{.}8$ra$($d$)/($s$^(2)).$ Determine the velocity and acceleration of point A in terms of fixed i and j unit vectors at time t$=1\mathrm{.}5$s$.$

Answers:

v$\_($A$)=($i$+$j$)($m$)/($s$)$

a$\_($A$)=($i$+$i$$j$)($m$)/()$