gravity gravity discuss gravity include history forumlae sir isaac newton gravity home zero gravity specific gravity dishwasher rating gravity gravity force attraction body mass word gravity come latin word gravita mean weight force gravity body exert express f force gravity experience body m mass body g gravitational constant m kg s m mass second body r radius body important equation find force gravity object planet newton second law state f m substitute f equation m equation divide side m degree angle g new formula know gravitational constant mass earth distance centre earth work gravity earth note gravity measure kg find surface gravity sponsor cruise stay cruise stay cruise stay cruise stay holidays cruise stay definition gravity gravity force attraction body mass gravity indoor bike trainer dishwasher ratings home house design software specific gravity