Resposta :
WFp = -ΔEp
WFp = -(Epf - Epi)
WFp = Epi - Epf
WFp = mghi -mghf
WFp = mg.0 - 5.10.20
WFp = -1000J
WFp = -(Epf - Epi)
WFp = Epi - Epf
WFp = mghi -mghf
WFp = mg.0 - 5.10.20
WFp = -1000J