Answer
a) 170 $cm/s^{2}$
b) 0.15 s
Work Step by Step
a)
$v^{2} = u^{2} +2ax $
$a = \frac{v^{2} - u^{2}}{2x} = \frac{(26)^{2}-(0)^{2}}{2(2.0)} = 169 \approx 170 cm/s^{2} $
b)
$x = \frac{1}{2}(u+v)t $
$t = \frac{2x}{u+v} = \frac{2(2.0)}{0+26} \approx 0.15 s $
