Write the vector expression for the acceleration a of the mass center $G$ of the simple pendulum in both $n-t$ and $x-y$ coordinates for

the instant when $=50$ if ${}^{}=2\mathrm{.}39ra\frac{d}{sec}$ and ${}^{}=4\mathrm{.}185ra\frac{d}{se{c}^2}.$

Answers: