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[[circled]] 3 [[/circled]] SOME ORBITAL MECHANICS (not from Physics notes) [[circled]] 1 [[/circled]]"WHAT'S AN ORBIT" - DROP SOMETHING, IT FALLS [[arrow]] DOESN'T MOVE HORIZONTALLY F TOWARD CENTER of EARTH GRAVITY DOESN'T AFFECT HORIZONTAL MOTION, ONLY VERTICAL [NEGLECT AIR RESISTANCE] [[image]] [[arrow left]] FALLS, & TAKES CERTAIN TIME TO FALL [[arrow up]] TIME IS DETERMINED BY GRAVITY (&HEIGHT) [[image]] [[arrow left]] HORIZONTAL, UNAFFECTED BY GRAVITY [[arrow left]] VERTICAL, GRAVITY ONLY [[image]] FASTER HORIZ., ... GOES FARTHER & (SAME TIME TO COFER VERTICAL DISTANCE ... BUT GOES FURTHER IN THAT TIME EXAMPLE: BULLET DROPPED & FROM RIFLE NEXT STEP ... EARTH ISN'T FLAT [[image]] [[arrow left]] SAME TIME TO TRAVEL THE VERTICAL DISTANCE ... BUT HASN'T HIT YET