# Why you call momentum for momentum?

1. Feb 4, 2010

### archis

I am confused. For you, americans, value p=mv is momentum. But in my language (latvian and also in russian) we call it impulss. Whats wrong with the definitions? I think for you impulss is dP (F=dP/dt).

2. Feb 4, 2010

### ExtravagantDreams

Momentum comes from the Latin word Mótus, meaning movement or motion. Hence it is associated with velocity.

Impulse comes from the Latin impulsus meaning to push. Hence it is associated with Force.

3. Feb 4, 2010

### Stonebridge

Yes, impulse is force multiplied by time. Ft (=Change in momentum)
It has the same units as momentum.
The words may change from language to language but the definitions are mathematical, and are the same in all languages.
In English, for example, words like force, power, momentum and impulse have "everyday" meanings that do not necessarily correspond to their scientific meanings.

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