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PHY 231
Your 'cq_1_21.1' 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 ball is tossed vertically upward and caught at the position from which it was released.
• Ignoring air resistance will the ball at the instant it reaches its original position be traveling faster, slower, or at the same speed as it was when released?
answer/question/discussion: ->->->->->->->->->->->-> :
Ignoring air resistance and other unmentioned forces, the ball will be traveling at the same speed as it was released when it returns to the same position due to gravity. Kinetic energy is conserved as it changes form, from kinetic to gravitational potential back to kinetic energy as it rises and falls.
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• What, if anything, is different in your answer if air resistance is present? Give your best explanation.
answer/question/discussion: ->->->->->->->->->->->-> :
If there is fluid friction in the ball's atmosphere, then the ball experiences air resistance as its position climbs and its downward speed increases ( the greater of both, the greater the resistance ), causing the ball to decrease in its velocity. Thus, its speed would be less than its original if air resistance is accounted for.
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20 Minutes
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&#Very good responses. Let me know if you have questions. &#