PHY100H5 Lecture Notes - Lecture 5: White Dwarf, Gravitational Collapse, List Of Association Football Teams To Have Won Four Or More Trophies In One Season
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Forces are actions that cause accelerations; acceleration is directly proportional to the force and inversely proportional to the mass (inertia) Weight and mass are different concepts: a rock in space has no weight, but still has the same inertia as on earth. Forces always come in opposite pairs objects interact with one another. Momentum is mass times velocity and it changes when external forces are exerted; the total momentum is conserved in an isolated system. An invisible force: the apple and the moon. The birth and death of stars: gravitational collapse. If an object is moving, it will continue to move unless there"s a(cid:374) e(cid:454)ter(cid:374)al for(cid:272)e to (cid:272)ause other(cid:449)ise (cid:894)la(cid:449) of i(cid:374)ertia(cid:895) There has to be some force that is diverting the moon from its natural direction. The (cid:448)elo(cid:272)it(cid:455) of the (cid:373)oo(cid:374) does(cid:374)"t see(cid:373) to (cid:271)e i(cid:374) the sa(cid:373)e dire(cid:272)tio(cid:374) as the (cid:448)elo(cid:272)it(cid:455) of a(cid:374) apple falli(cid:374)g to earth.