A golf ball and bowling ball are rolling at the same speed. Which has the greater momentum?

The bowling ball has more momentum because it is bigger and has more weight to it than the golfball.

If a golf ball and a bowling ball are rolling at the same speed, use MSM as an analogy: More mass, more Speed, more Momentum. The golf ball is smaller, and may be going the same speed as the bowling ball but the bowling ball has a much greater mass than the golf ball. The bowling ball has the greater momentum. The bigger the object, the faster it goes, the more momentum it has.