1. Fred\'s ball and Barney\'s ball have the same size, but Barney\'s ball is hol
ID: 1290656 • Letter: 1
Question
1. Fred's ball and Barney's ball have the same size, but Barney's ball is hollow. Betty's ball and Wilma's ball are scaled down versions of Fred's ball and Barney's ball respectively. They all place their bowling balls on the same pitch incline and release them from rest at the same time. (Select G-Greater than, L-Less than, E-Equal to, ). Please see diagram printed on your homework page. The order of the objects in the diagram is Fred, Betty, Barney, Wilma. A) The time it takes for Wilma's ball to hit the pins is .... that for Barney's ball to hit. B) The time it takes for Wilma's ball to hit the pins is .... that for Fred's ball to hit. C) The time it takes for Betty's ball to hit the pins is .... that for Fred's ball to hit. D) The time it takes for Wilma's ball to hit the pins is .... that for Betty's ball to hit. E) The time it takes for Barney's ball to hit the pins is .... that for Fred's ball to hit. F) The time it takes for Betty's ball to hit the pins is .... that for Barney's ball to hit.Explanation / Answer
Simple question about mass. Assuming the girl's balls are not *hugely* different in size from the boy's balls (so to speak), then Barney's ball will be the heaviest as it is the biggest AND is filled Wilma's ball is next heaviest, it is not the biggest, but it is filled Fred's ball is next, being biggest but hollow Betty's ball is last, being both the smallest and hollow Note if Wilma's ball is very very small, then Fred's ball might be slightly heavier, but we assume this is not the case. They're all acted on by the same forces (same friction, same gravity, etc) and they all start at the same speed (from rest), so there are no extra factors to consider. Thus we'd expect the balls speed to be ordered from fastest to slowest as: Barney, Wilma, Fred, Betty Time is, of course, related to the speed. The faster it gets there, the less time it takes. so your answers are: 1 C 2 A 3 C 4 A 5 A 6 A Note it can't be answer B - the balls are all different.
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