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m=2 kg
h=80 cm
g=9,8 m/s2
Formula
Ep = m.g.h
Energia potencial en el piso
Ep = 2 kg* 9,8 m/s2 * 0,8m*
Ep = 15,68 J
Energia potencial en la silla
Ep = 2 kg* 9,8 m/s2*0,4m
Ep = 7,84 J
Energía potencial en el techo (0,8m-3m = -2,2 m )
Ep = 2 kg* 9,8 m/s2*-2,2m
Ep = - 43,12 J