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t=15s
Vk=0
s=?
a=?
V=s/t /*t
s=V*t [m/s *s=m]
s=30*15
s=450m
a=(Vk-VP)/t
a=(0-30)/15
a=-30/15
a=-2m/s²
odp: droga hamowania wynosi 450m, a przyspieszenie -2m/s².