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Verified answer
Vo = 5 m/sa = 1 m/s²
a. Kecepatan pada detik ke 4
Vt = Vo + a×t
Vt = 5 + 1×4
Vt = 5 + 4
Vt = 9 m/s
b. Jarak yang ditempuh pada detik ke 4
S = Vo×t + ½×a×t²
S = 5×4 + ½×1×4²
S = 20 + ½×16
S = 20 + 8
S = 28 meter