Quiz 2 - Quiz2 Yourresponsehasbeensubmittedsuccessfully....

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Quiz 2 Your response has been submitted successfully.   Points Awarded  5 Points Missed  15 Percentage  25% 1. You are riding a multi-speed bicycle up a steep hill that's 100 m high and want to do as little work as possible on  your way up the hill. A. Your choice of gears doesn't matter because you'll do  the same amount of work climbing the hill no matter  which gear you choose. B. You should choose the largest crank sprocket (attached  to the pedals) and the smallest freewheel sprocket  (attached to the rear wheel). C. You should choose the largest crank sprocket (attached  to the pedals) and the largest freewheel sprocket  (attached to the rear wheel). D. You should choose the smallest crank sprocket  (attached to the pedals) and the largest freewheel  sprocket (attached to the rear wheel). Points Earned: 0/1 Correct Answer: A Your Response: C 2. A popular playground toy is a flexible seat that has automobile springs attached to it for a little bounce. When a  200 N child sits on the toy, it compresses 5 mm downward. What is the ride’s spring constant?
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A. 1000 N B. 5 mm C. 40000 N/m D. 1000 N/m Points Earned: 0/1 Correct Answer: C Your Response: B 3. It is important for cyclists to lean their bicycles while negotiating sharp turns because A. the torque created by their leaning balances out the  frictional torque from the road which would tend to flip  them. B. their tires flatten out, thus getting better traction on the  road. C. they increase their static stability D. the torque created by their leaning balances out their  weight and holds them up. Points Earned: 0/1 Correct Answer: A Your Response: C 4. The spin cycle in your washing machine partially dries clothes by spinning them in a perforated metal basket.  Such a process works because A. the water is drained by gravity out the bottom of the  basket. B. the water leaves the basket moving tangent to the  circular path
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C. the water is drawn to the center of the basket D. the water is forced directly outward from the basket Points Earned: 0/1 Correct Answer: B Your Response: A 5. You have watched one too many old cartoons and decide to drive around town with a giant spring that is 4 m  long and attached to the front of your car. You decide to help a semi truck that is stuck and try to push them  with your car. You take a running start, and when you contact the truck the spring in your car compresses 3 m.  During which portion of the compression did you do the least work on the spring? A.
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This note was uploaded on 06/21/2010 for the course PHY 120 taught by Professor D.nolen during the Summer '09 term at Parkland.

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Quiz 2 - Quiz2 Yourresponsehasbeensubmittedsuccessfully....

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