Phy 201
Your 'cq_1_15.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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A rubber band begins exerting a tension force when its length is 8 cm. As it is stretched to a length of 10 cm its tension increases with length, more or less steadily, until at the 10 cm length the tension is 3 Newtons.
• Between the 8 cm and 10 cm length, what are the minimum and maximum tensions?
answer/question/discussion: ->->->->->->->->->->->-> :
1 N, 2 N
The tension clearly exceeds 2 N on this interval; and it should be clear that as the band begins exerting tension, it exerts a tension very close to 0.
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• Assuming that the tension in the rubber band is 100% conservative (which is not actually the case) what is its elastic potential energy at the 10 cm length?
answer/question/discussion: ->->->->->->->->->->->-> :
3N
3 N is a force, not an energy. You need to indicate how you arrive at your answers.
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• If all this potential energy is transferred to the kinetic energy of an initially stationary 20 gram domino, what will be the velocity of the domino?
answer/question/discussion: ->->->->->->->->->->->-> :
.15cm/s
you need to show how you got this result
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• If instead the rubber band is used to 'shoot' the domino straight upward, then how high will it rise?
answer/question/discussion: ->->->->->->->->->->->-> :
#$&*
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25 min
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I apologize for the delayed posting of this file. I completed my review on 7/3, but the posting process apparently went awry and it is being posted two days late. It might therefore be a little out of order on your access page.