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B. Menambakan beban 10N• tuas
tuas jenis 2
Keadaan pertama (seperti pada gambar)
Lw = 30 cm
Lf = 30+120 = 150 cm
w = 450 N
F = __?
F • Lf = w • Lw
F = (Lw / Lf) • w
F = (30/150) • 450 N
F = 90 N
Keadaan kedua (setelah beban digeser)
Lw = 30-10 = 20 cm
Lf = 150 cm
Jika berat beban tetap w = 450 N
F' = __?
F' • Lf = w • Lw
F' = (Lw / Lf) • w
F' = (20/150) • 450 N
F' = 60 N
∆F = 60 - 90 = -30 N
Kuasa dikurangi 30 N
Jika gaya kuada tetap F = 90 N
w' = __
w' • Lw = F • Lf
w' = (Lf / Lw) • F
w' = (150 / 20) • 90
w' = 675 N
∆w = 675 - 450 = 225 N
Agar tuas tetap seimbang, setelah beban digeser
• mengurangi gaya kuasa 30 N ✔️
• menambah berat beban 225 N