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m = 2 kg
F = (30t²+6t)
Vo = 0
t = 2 s
Dit Ek..?
F = m . a
a = F / m
a = ( 30t²+6t) / 2
a = 15t² + 3t
Vt = Vo + (15t² + 3t)dt
Vt = 0 + (5t³ + 3/2t²)
Vt=(5t³ + 3/2t²)m/s t -- 2s
Vt = 5.2³ + 3/2.2²
Vt = 40 + 6
Vt= 46m/s
Ek= 1/2mv²
Ek = 1/2.2.46²
Ek = 2116 joule