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F=10N
t=2s
V=5m/s
m=?
V=a*t
a=V/t
a=5/2=2.5 m/s²
F=m*a
m=F/a
m=10/2,5= 4 kg
m=F/a
a=/\V / t
/\V-delta prędkości-różnica prędkości
/\V=Vk-Vp=5-0=5 {m/s)
a=5/2=2.5
m=10N*2,5=25 kg