zał. II zad.1 C 2. B 3. B 4. D 5. B 6.C 7. C 8. A 9. A a = F /m a = 6 N /2 kg = 3 m/s² 10. D F = m * a F = 100 kg * 5 m/s² = 5000 N 11. C m = F/a m = 1000/5 = 200 kg 12. t = 10 s V = 100 km/h - 28 km/h = 72 km/h = 20 m/s m = 20 t = 20000 kg F = m * a F = m * V/t F = 20000 kg *20 m/s / 10 s F = 40000 N 3, m₁ = 0,2 kg V₁ = 3 m/s m₂ = 0,1 kg V₂ = 0 m/s v m₁*V₁ + m₂*V₂ = (m₁+ m₂) V V = 0,2 kg * 3 m/s/0,3 kg V = 2 m/s zad.4. 0,2 kg * 5 m/s = 0,5 kg * V V = 1 kg*m/s /0,5 kg V = 2 m/s zad.5. V = 72 km/h = 72000 m/3600 s = 20 m/s F = 400 N P = ? P = W /t ale W = F* s P = F * s /t ale s/t = V P = F * V P = 400 N * 20 m/s P = 8000 W = 8 kW
