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Vo=20 m/s
s= 60 m
Vt=0 m/s(berhenti)
dit: a dan t=....?
percepatan:
Vt²=Vo²+2.a.s
0²-20²=2.a.60
400=120.a
a= -3,33 m/s (adanya perlambatan)
lamanya pedal rem di injak:
t=