If a 3 kg object has a momentum of 33 kg ms whats its velocity?

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.)