1. ## momentum and impulse

"That's dangerous, not only for the driver, but for everyone else on the road. The brake system is designed for a load of 21 tones. When the truck is eight or nine tones overloaded, the momentum doesn't let you stop unless you really stand on the brakes."

Hi,

I would like to know if I could use “impulse” instead of ”momentum” in this sentence.

I also wonder if “momentum” is an informal word. In the negative case, which word should I use casually, please?

Thanks.

2. ## Re: momentum and impulse

Originally Posted by jctgf
"That's dangerous, not only for the driver, but for everyone else on the road. The brake system is designed for a load of 21 tonnes. When the truck is eight or nine tonnes overloaded, the momentum doesn't let you stop unless you really stand on the brakes."

Hi,

I would like to know if I could use “impulse” instead of ”momentum” in this sentence.

I also wonder if “momentum” is an informal word. In the negative case, which word should I use casually, please?

Thanks.
Momentum is the correct word, meaning the quantity of motion of a moving body, equal to the product of its mass and velocity.

Impulse is not an alternative in this context. There is no "informal" word that can replace momentum.

3. ## Re: momentum and impulse

Momentum is the impetus of a moving body.It is the product of mass and velocity.
Impulse is the effect of momentum in a very short period of time .
So momentum is correct here.

4. ## Re: momentum and impulse

Note:
American spelling: ton(s)
British spelling: tonne(s)
~R

5. ## Re: momentum and impulse

Originally Posted by RonBee
Note:
American spelling: ton(s)
British spelling: tonne(s)
~R
European spelling (!) = tonne

We Brits still have tons as well

6. ## Re: momentum and impulse

Originally Posted by Anglika
European spelling (!) = tonne

We Brits still have tons as well
Interesting.

7. ## Re: momentum and impulse

RonBee :Yes - but you've won ground with 'program'. The only time we see 'programme' any more is referring to the flyer at a theatre performance. It's all 'TV programs' here now.

8. ## Re: momentum and impulse

Originally Posted by David L.
RonBee :Yes - but you've won ground with 'program'. The only time we see 'programme' any more is referring to the flyer at a theatre performance. It's all 'TV programs' here now.
The American influence?

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