momentum
/ˌmoʊˈmɛntəm/noun
The force that keeps a moving object moving, calculated as its mass multiplied by its speed.
Example sentences
- “The sled picked up momentum as it raced down the hill.”
- “A heavy truck has more momentum than a car moving at the same speed.”
Outside physics, campaigns and teams 'gain momentum' or 'lose momentum'; those are the usual verbs.