
#1
Dec2005, 08:31 AM

P: 1

If there is a 1.36 kg weight falling .1524 meters,
how many joules are created when the object reachs the end of the .1524 meters. How do you calculate this? I came up with 2.032 joules which is .20723 kg meters which I think is enough power to lift 1.36 kg .1524 meters which is the same as where I started and that cannot be correct because a falling object has more power than the same object standing still. Thanks, Greg 



#2
Dec2005, 09:01 AM

Admin
P: 21,625

This seems like a homework problem from Introductory Physics.
However, an object falling implies falling due to gravity. What one has is a conversion/transformation from gravitational potential energy to kinetic energy. Taking the acceleration of gravity to be constant, the change in gravitational potential energy is mg[itex]\Delta h[/itex], where [itex]\Delta h[/itex] is the change in elevation. 


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