Answer
(a) $630N$
(b) $76W$
Work Step by Step
(a) We can find the required force as
$F=\frac{W}{d}$
We plug in the known values to obtain:
$F=\frac{19J}{0.030m}$
$F=630N$
(b) We can find the required power as
$P=\frac{W}{t}$
We plug in the known values to obtain:
$P=\frac{19}{0.25}$
$P=76W$
