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Fw = 700 N - 400 N = 300 N ; b
zad.7. a
zad.8.
F = 50 N
g = 10 N/kg
F= m * g
m = F/g
m = 50 N /10 N/kg = 5 kg ; b
zad.9 a ; bo V = g * t
zad.10. c
zad.11.
m = 2 kg
a = 3 m/s²
F = m * a
F = 6 N ; c
zad.12 b. I zasada dynamiki
zad.13. b