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Ppt newton's law
- 1. (Force)
- 2. (Resultant force, Net force)
- 3. x y Y x y X
- 4. 2. (Sir Issac Newton) “ “ ” ”
- 5. “ ” “ (Action Force) (Reaction Force) ”
- 6. “ ” (mass)
- 7. ? a F a
- 8. a m1 a m a F m F ma F = kma k
- 9. k=1 / / F = ma
- 10. “ ”
- 11. - -
- 13. (Weight) m
- 14. m1 m2
- 16. m1 m2 R G G (Universal gravitational constant)
- 17. : x 10 24 kg : Fg = mg g
- 18. : g g (weightlessness)
- 19. (Friction Force) N F f mg (static friction) s = sN
- 20. (kinetic friction) k = kN ( s) ( k)
- 21. 1. Free-body diagram 2. 3.
- 22. F 20 N 600 5 kg , g = F m/s2 , 9.8 = 0.1 6 00 2 m M M M m a a M F m
- 23. 3 m M M>m a a m m M 4 M m
- 24. 5 s = 0.50 k = 0.44
- 25. P = Fv kv2 v2 v v kv2 f1 + f2 = F f1 f2