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Time for me to do another demonstration for some coworkers, and I want to make sure I'm being accurate.

The idea is to explain how much force a small 2000lb car moving at 40mph has, and then explain the speed that an 8lb bowling ball would need to have the same amount of force.

So far I've been looking at P=mv for the inertia. With that formula I get a velocity of 10,000mph for the bowling ball. That seems excessive!

I'd like to figure this out in terms of impact force, because ultimately we're discussing the damage done in an accident.

Any help on what I might want to look at next?

Thanks!