Momentum = (mass) x (speed)
33 kg-m/s = (3 kg) x (speed)
Divide each side by 3 kg :
(33 kg-m/s) / (3 kg) = speed
11 m/s = speed
(You asked for velocity, but didn't give us any information about the direction
in which the object is moving. So we can only work with the speed.)
