Answer
A motor must have a minimum horsepower of 2.6 hp.
Work Step by Step
$P = F\cdot v$
$P = mg~\mu_k\cdot v$
$P = (370~kg)(9.80~m/s^2)(0.45)(1.20~m/s)$
$P = 1958~W$
We can convert this power to units of hp.
$P = (1958~W)(\frac{1~hp}{746~W}) = 2.6~hp$
A motor must have a minimum horsepower of 2.6 hp.