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E-Modul Model Pembelajaran CinQASE Kelas X KD 3.7

Penye: F = m . a
W 1 – W 2 = m . a

30 – 20 = 5 . a
10 = 5. a

2
a = 2 m/s
Mencari tegangan tali:

Tinjau m 1 = 3 kg:

T = m (g - a)
T = 3 (10 - 2)

T = 24 N
9. Jawaban: B

Dik: m = 12 kg
Α = 30

F = 84 N

t = 10 s
v = 0 m/s

Dit: s =…?

Penye: F – m . g . sin α = m . a
2
84 N – 12 kg . 10 m/s . sin 30 = 12 kg . a
84 N – 120 N . ½ = 12 kg . a
84 N – 60 N = 12 kg . a

2
a = 24N/12kg = 2 m/s
2
s = v . t + ½ a . t
2
s = 0 + ½ . 2 . 10
s = 100 m
10. Jawaban : C

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