210 likes | 308 Vues
Discover Newton's rules for natural philosophy and the three force approaches. Explore the effects of gravity, space curvature, and a universe in constant expansion.
E N D
What Hath Befallen Gravity? Topic 4
Newton’s rules for the study of natural philosophy • Simplicity • Generality • Experimental verification • Theories are tentative
Three Approaches to Forces • Action at a distance -no mechanism • Field Description -space changed by body • Particle Exchange -emitted or removed
Principle of Equivalence • Downward pull of gravity can be duplicated by an upward acceleration