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V= Vo + a.t
V= 0 + 3.2
V= 6 m/s
Ek= 1/2.m.V²
Ek= 1/2.4.6²
Ek= 2.36
Ek= 72 J
m = 4kg
vo = 0
a =3m/s²
t = 2 s
ditanyakan :
W = ?
jawab:
vt = vo + at
vt = 0 + 3(2)
vt = 6 m/s
W = ΔEk
W = 1/2 m (vt²-vo²)
W = 1/2 (4) (6²-0²)
W = 2 (36)
W = 72 J