PHYS201 Lecture 13: Gravity
5 Dec 2016
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Newton was not the first to discover gravity. Legend newton, sitting under an apple tree, realized that the force causing an apple to accelerate downward is the same force causing the moon to move in circular path around the earth. Newton was the first to realize that the moon is constantly falling toward the earth. Earliest babylonian star catalogs are dating from about 1200 bce b. efore (the) c. ommon e. ra (bce ) or before christ (bc) or anno domini (ad) (translated as in the year of the lord) 2016 + Wanted to determine how the heavens were constructed and pursued a project to identify positions of both stars and planets. Best known for developing laws of planetary motion. Legend of the leaning tower of pisa: galileo showed that dropped objects fall to the ground at the same time when air resistance is negligible. The uni(cid:448)ersal la(cid:449) of gra(cid:448)ity ne(cid:449)ton"s law of universal gravitation.
