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N - w cosα = 0
N = mg cosα
∑Fx = m a
(karena tepat akan bergerak maka a=0) sehingga:
∑Fx = 0
F - fgesek - w sinα = 0
F = w sinα + fgesek
F = m g sinα + μN
F = mgsinα + μmgcosα
F = mg (sinα + μcosα)
F= 8 x 10 (sin45° + 0,5 x cos45°)
=80 (1/2√2 + 0,5 x 1/2√2)
= 60√2 N