|11-05-2007, 11:21 PM||#1 (permalink)|
Join Date: Aug 2007
Just some physics question.
Hey guys, again, I have a physics HW question that bothers me. I would really appreciate if you could help me with it.
Here's the problem:
I would really appreciate you help
Thanks in advance,
|11-06-2007, 09:47 AM||#3 (permalink)|
Join Date: Jul 2007
Location: Eugene, Oregon
But if I remember from physics class, you don't need time to do it. Impulse = change in momentum. So you can also use mass * change in velocity.
So your change in velocity is -20 m/s
Mass is 1,000 kg
Impulse would be -20,000Ns
or if you use or MV2 - MV1. (Mass*Final - Mass*Initial) you get 1,000*0 - 1,000*20 which is still -20,000
I don't see how you need time in this problem. Then again, I haven't dealt with physics in a few years. Don't listen to me unless you are positive I'm correct, because I have no idea.
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