William Frederick is credited with the invention of the modern frisbee in the mid 1950's. In 1957 the Wham-O Company bought his idea and the rest is history. They named the toy after William Frisbie who was a ________?
Options: Pie maker, Owner of a pizza parlor, Student at Yale, Ceramic plate designer
Options: necessary centrifugal force may be obtained from the horizontal component weight of the train, to avoid frictional force between the tracks and wheels, necessary centripetal force may be obtained from the horizontal component of the weight of the train, the train may not fly off in the opposite direction