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Verified answer
Dik:m = 20 kg
Vo = 0
a = 0,8 m/s²
t = 10 s
dit: usaha pada t pertama (W)
jawab:
F = m × a = 20 × 0,8 = 16 N
s = Vot + (1/2)at²
= 0 + 1/2 × 0,8 × 100
= 40 m
W = F × s
= 16 × 40
= 640 Joule (c).