dik: v = 144 km/jam s 40 m vo = o dit :a dant?

GLBB


s = vo*t + 1/2 at²
40 m = 0 + 1/2 a t²
80 m = at² (... 1)

144 km /jam
= 144 (1000/3600)
= 40 m/s

vt = vo + at
40 = 0 +at
at = 40

subs ke pers 1

80 = 40t
t = 2 s

Maka

a = 40 / 2 = 20 m/s²

KINEMATIKA
• Gerak lurus

GLBB
Vₜ = 144 km/j = 144/3,6 = 40 m/s
S = 40 m
V₀ = 0. seperti inikah ?
α = __, t = __?

a][ percepatan
Vₜ² = V₀² + 2 α S
40² = 0 + 2 • a • 40
40×40 = 2×40×a
a = 20 m/s ✓

b][ waktu
S = ½ (V₀ + Vₜ) t
40 = ½ (0 + 40) t
40 = 20 t
t = 2 s ✓