Penjelasan:
a.
jika ∅ = 0°
Wf = F.s.Cos (0°)
Wf = 10 x 3 x 1
Wf = 30
Wf = 30 Joule
b.
Wb = m.g.s.Cos (180°)
Wb = 4 x 9,8 x 3 x -1
Wb = -117,6 Joule
Wtotal = 30-117,6
Wtotal = -97,6 Joule
= 97,6 Joule
Kerja yang dilakukan oleh gaya luar
W = F · Δy
= (10 N)(3 m)
= 30 J
Kerja yang dilakukan oleh gravitasi
W = -m · g · Δy
= -(4 kg)(9,8 m/s²)(3 m)
= -118 J
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Penjelasan:
a.
jika ∅ = 0°
Wf = F.s.Cos (0°)
Wf = 10 x 3 x 1
Wf = 30
Wf = 30 Joule
b.
Wb = m.g.s.Cos (180°)
Wb = 4 x 9,8 x 3 x -1
Wb = -117,6 Joule
Wtotal = 30-117,6
Wtotal = -97,6 Joule
= 97,6 Joule
Kerja yang dilakukan oleh gaya luar
W = F · Δy
= (10 N)(3 m)
= 30 J
Kerja yang dilakukan oleh gravitasi
W = -m · g · Δy
= -(4 kg)(9,8 m/s²)(3 m)
= -118 J