Chapter 4 & 5Dynamics:
Newton's Laws and Its
Application
Isaac Newton(1643-1727)Mathematician and physicist, the greatest scientist of all time.
“The discovery of the laws of dynamics, or the laws of motion, was a dramatic moment in the history of science... after Newton there was complete
understanding. ——R. Feynman
“Nature and Nature's laws lay hid in night;
God said, Let Newton be! And all was light.”
——Alexander Pope
2
“If I have been able to see a little farther than other man, it’s because I have stood on the shoulder of giants.”
——Isaac Newton
Work and energy
Newton’s laws
MomentumAngular momentum
3
Force(action capable of accelerating an object) FmGFG4Newton’s First Law of MotionAristotle (384-322 B.C.)
Force is necessary to keep a body in motionGalileo Galilei (1564-1642)Idealized experiment with no frictionNo forces →constant speed in a straight lineNet force
F2
F1
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大学生物学Physics(4) - 图文
