Need help with a physics question
Hi guys, I'm having a lot of trouble understanding this question and if you guys could help me that would be great.
Is it possible for an object to have momentum without having kinetic energy? Can it have kinetic energy but no momentum?
January 4, 2013
4 Comments • Newest first
mv, v !=0
.5mv^2 != 0 since v!= 0
Same for other way.
Thanks guys, I got it now
^second edit: upon rereading, my answer was the same as his essentially
I dont think so, and both of these sites back me up so i guess not
Wiki answers: No, an object cannot have kinetic energy and no momentum. Here's the reason:
Kinetic energy is the energy an object derives from being in motion. If an object is moving, it has some non-zero velocity. Momentum is the product of mass (which the object will have) and velocity, which it must exhibit to have kinetic energy. That is why an object cannot have kinetic energy with no momentum.
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Yahoo answers: An object with momentum always has energy. If it is moving, it possesses kinetic energy. However, an object with energy does not always have momentum; think about something with potential energy. It possesses energy, and yet it is not moving, so it has no momentum.