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g= 10 m/s²
Dit: W..?
Peny: a.) F= m.g ⇒ F= 0,25 x 10 ⇒ 2,5 Newton
b.) W= F.s ⇒ W= 2,5 x 5 ⇒ 12,5 Joule
m = 0,25 Kg
g = 10 m/s²
h₁ = 1 m
h₂ = 6 m
Dit :
W = . . . . . ?
Penyelesaian :
W = ΔEp
W = m • g • h₂ - m • g • h₁
W = m • g • (h₂- h₁)
W = 0,25 • 10 • (6 - 1)
W = 0,25 • 10 • 5
W = 12,5 Joule
Jadi, besar usahanya adalah 12,5 Joule