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what is the gravitational potential energy relative to the ground of a 1.0-kg box at the top of a 50-m building ?

Respuesta :

''Gravitational PE is calculated as mgh where m is a mass, g is the acceleration due to gravity, and h is a perpendicular height. 
So in this case PE = 1*9.81*50 = 490.5J 
I am assuming that 50m is the height of the building.''

hope this helps