# HW Ch9 - HW Ch 9 Uniform Circular Motion Chapter 9 Uniform...

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HW Ch. 9 Uniform Circular Motion Chapter 9: Uniform Circular Motion Conceptual problems 9.C.3 (5.00) You move a roller coaster with a loop-the-loop from the Earth to your new amusement park on the Moon. (a) How does the minumum speed to complete the loop-the-loop compare between the Earth and the Moon? (b) A roller coaster car starts from rest on a hill that preceeds the loop. On the Earth, if the car is released on the hill from a height h above the bottom of the loop, it will have the minimum speed required to get around the loop. Is the release height required to just get around the same loop on the Moon greater than, less than, or equal to h ? (a) It is greater on the MoonIt is less on the MoonThere is no difference (0/1 submissions used) (b) GreaterLessEqual (0/1 submissions used) 9.C.4 (5.00) Does an object moving in uniform circular motion have constant centripetal acceleration? Yes No (0/1 submissions used) 9.C.7 (5.00) The hammer throw is a track-and-field event, popular in Scotland, in which a ball on a rope (the "hammer") is whirled around the thrower in a circle before being released. The goal is the send the ball as a projectile as far down the field as possible. At a track meet, the circle in which a ball is whirled by a hammer thrower is at a 45° angle to the ground. To achieve the longest distance, at what point in its tilted circular orbit should the thrower release the ball?

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At its lowest pointAt its highest pointHalfway as it moves from the lowest to the highest pointHalfway as it moves from the highest to the lowest point (0/2 submissions used) 9.C.9 (7.00) An object is moving at a constant speed around a circle. (a) In which of these cases does the magnitude of the centripetal acceleration of the object increase? (Assume all other factors are kept the same.) (b) In which case does the
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HW Ch9 - HW Ch 9 Uniform Circular Motion Chapter 9 Uniform...

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