" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
- Gerak dan Gaya
- Usaha dan Energi
m = 20 kg
g = 10 m/s²
F = 150 N, sejajar bidang miring
θ = 37° → sin θ = ³/₅ dan cos θ = ⁴/₅
μk = 0,1
S = 10 m
Gaya berat benda
w = m g
= 20 · 10
= 200 N
a][ Gaya normal
N = w cos θ
= 200 · ⁴/₅
= 160 N ← jwb
b][ Gaya gesekan kinetis
fk = μk N
= 0,1 · 160
= 16 N ← jwb
c][ Komponen gaya berat yang sejajar bidang miring
wx = w sin θ
= 200 · ³/₅
= 120 N ← jwb
d][ Usaha total
W = ∑F · S
= (F - wx - fk) · S
= (150 - 120 - 16) · 10
= 14 · 10
= 140 J ← jawaban