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F = 200 N
m = 18 kg
a = 3 m/s²
θ = 30°
ditanya :
gaya gesek (fg)
jawab :
W = m g
W = 18 x 10 = 180 N
∑F = m a
F - W sin θ - fg = m a
200 - 180( sin 30 ) - fg = 18(3)
200 - 90 - fg = 54
fg = 200 - 90 - 54
fg = 56 N