Page 120 - DESAIN E-MODUL - Edit 1-3_Neat

E- Modul Model Pembelajaran CinQASE

(m a + m b) V b = m a V a’ + m b V b’
(60+40)(0) = 60 x 5 +40 x V b’
-300 = 40 V b’
V b’ = -7,5 m/s
Kecepatan bilal lebih besar daripada ali.

3. Dik : m = 2000 kg
V 0= 0 m/s
Vt = 10 m/s
∆ = 5 s
Dit : F ?
Penye :
F∆ = m∆
F∆ = m (Vt - V 0 )
F(5) = 2000(10-0)
F = 4000 kg.m/s 2
4. Dik : m m = 1200 kg
V m = 4 m/s
m b = 40 kg
V b = 4 m/s
Dit : v’ ?
Penye :
a. m m V m + m b V b = m m V m’ + m b V b ‘
1200 (4)+40(0) = 1160 (V m’)+400
4800 = 1160 V m’ +160
V m’ = 4, 27 m/s

b. m m V m + m b V b = m m V m’ - m b V b ‘
1200 (4)+40(0) = 1160 (V m’) - 400
4800 = 1160 V m’ -160
V m’ = 4 m/s

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