Political momentum changed during the late 1970s and throughout the 1980s.

They are learning right now how quickly momentum can change.

This is how momentum can change without having energy change.

We've got a big game tomorrow and momentum can change very quickly in a short series.

But, in a short series, the momentum can change.

But the momentum changed in the afternoon, when Woods began his second round on the par-4, 314-yard 10th hole.

"He had me down 3-0, 15-40, and then the momentum changed."

The cart's momentum changes the most when the block is massive.

It's amazing how fast momentum can change in this game.

With the momentum changed, they were more easily able to move the ball on their final two drives.