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phy 121
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: ->->->->->->->->->->->-> :
The ball will begin with an initial velocity say 9.8m/s. The ball will go 9.8 meters in one second until the downward force of gravity in that same second brings the ball to a velocity of zero, at which point the ball will fall due to the acceleration of gravity and obtain a velocity of 9.8 m/s in one sec, bringing the ball to its original position where its final velocity will be the same as its initial velocity. A more complex example might produce different results but here it can be reasonably said that the speed will remain the same.
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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 air resistance or other forces are NOT neglible, they will debilitate the acceleration of the ball giving it a lower final velocity than the velocity it started at, unless the same air resistance or force acts as the ball is travelling up, in which case the numbers could still be the same.
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5m
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&#See any notes I might have inserted into your document, and before looking at the link below see if you can modify your solutions. If there are no notes, this does not mean that your solution is completely correct.
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Solution
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Good. No revision is required; the link is just FYI.
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