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Verified answer
4.Diketahui :
Vo = 10 m/s
V = 20 m/s
t = 5 s
Ditanyakan : S = ... m
Pembahasan :
V = Vo + a.t
a = (V-Vo)/t = 10/5 = 2 m/s^2
V^2 = Vo^2 +2.a.s
s = (V^2-Vo^2)/2a = 300/4 = 75 m
5.
Diketahui :
Vo = 50 m/s
Voy = 40 m/s
t = 3s
Ditanyakan : y = ... m
Pembahasan :
Voy = 30 m/s
y = 40.3 - 5.(3)^2
y = 120 - 45 = 75 m
6.
Diketahui :
F = 20 N
m = 10 kg
t = 2 s
Vo = 0 m/s
Ditanyakan : v = ... m/s
Pembahasan :
F = m.a
a = F/m = 20/10 = 2 m/s^2
v = Vo + a.t = 0 + 2.2 = 4 m/s
Verified answer
4][
Vo = 10 m/s
Vt = 20 m/s
t = 5 s
S = __?
jarak tempuh
S = ½ (Vo + Vt) t
S = ½ • (10 + 20) • 5
S = 75 m ← jwb
5][
Voy = 40 m/s
t = 3 s
g = 10 m/s²
y = __?
y = Voy t - ½ g t²
y = 40 • 3 - ½ • 10 • 3²
y = 120 - 45
y = 75 m ← jwb
6][
m = 10 kg
F = 20 N
Vo = 0
t = 2 s
Vt = __?
ANGGAP bidang datar licin
F t = m (Vt - Vo)
20 • 2 = 10 (Vt - 0)
40 = 10 Vt
Vt = 4 m/s ← jwb