Quick and easy physics question

[MajesticMoose]

A friend of mine asked me to verify something for her, so:

if an object's kinetic energy is equal to its rest energy, does that mean its not moving?

She says the answer is yes, and i agree, but it seems too simple. Can somebody check that please?

TIA,
m00se

 

[rgwalt]

no, that is incorrect.

 

[PsychoAndy]

hmm.......KE is equal to PE, but energy is not created nor destroyed.....

heres a little tidbit, if KE = 100

KE=100 PE = 0 rapid motion
KE=75 PE=25 slower motion
KE=50 PE=50 " "

etc...so lets see....i think the answer would be not necessarilly

an object can have the same KE and the same PE, but if the value of KE is more than 0, then the object is in motion, therefore gumming up your friend's (BTW, pics?) thepry

 

[JohnCU]

well KE doesn't necessarily equal PE, but KE + PE always = 100.

 

[MajesticMoose]

Sorry, i'm not posting pics, but thanks for the help. 10's all around

m00se

 

[Eli]

Aww.. No pic?

lol.. just seemed appropriate. I don't really want a pic of her, I have a woman.

 

[simms]

damn. and i thought this was about physics

 

[Jzero]

If at has any kinetic energy at ALL, it's DEFINITELY moving. It's only not moving if it has zero kinetic energy...although that does not imply that it has more than zero potential energy.
an object sitting at a height of zero (whatever your zero point may be) has zero potential energy, since PE = mass * height (* g). if h = 0, PE = 0.

 

[duke]

Can you define "rest energy"? Is that the same as potential energy?