$1).$ As a baseball is being thrown, it goes from $0$ to $150$ km$/$h in $0\mathrm{.}50$ s$.$

$($a$).$ What is the acceleration of the baseball?

$($b$).$ What is the acceleration in g$\text{'}$s$?$

$($c$).$ How far does the baseball travel in $0\mathrm{.}30$ s and how fast is it moving at this time?

$2($a$).$ A light$-$rail commuter train accelerates at a rate of $1\mathrm{.}15$ m$/$s$2.$ How long $($in s$)$ does it take to reach its top speed of $80\mathrm{.}0$ km$/$h$,$ starting from rest?

$($b$).$ Blood is accelerated from rest to $30\mathrm{.}4$ cm$/$s in a distance of $1\mathrm{.}83$ cm by the left ventricle of the heart. How long $($in s$)$ does the acceleration take?