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t=7s
v1=5m/s
v2=20m\s
delta v=15m/s
a=deltav/t
a=15m/s:6s=2.5m/s2
ΔV- zmiana prędkości w czasie Δt
ΔV=Vk-Vp
a) Vp=5m/s Vk=20m/s Δt=6s
a=(20m/s-5m/s)/6s
a=2,5m/s²
b) Vp=10m/s Vk=100m/s Δt=10s ΔV=90m/s
a=90m/s/10s
a=9m/s²