Odpowiedź :
v₁=5m/s
s=20m
v₂=7m/s
7m/s-5m/s=2m/s
s=v/t
t=v/s
t=2m/s / 20m
t=0,10s
s₂=5m/s / 0,10s= 50m
s=20m
v₂=7m/s
7m/s-5m/s=2m/s
s=v/t
t=v/s
t=2m/s / 20m
t=0,10s
s₂=5m/s / 0,10s= 50m