cq_1_091

Phy 121

Your 'cq_1_09.1' 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 accelerates uniformly as it rolls 20 cm down a ramp, starting from rest, in 2 seconds.

• What are its average velocity, final velocity and acceleration?

answer/question/discussion: ->->->->->->->->->->->-> : vAve=10cm/sec, 20cm/sec, 10cm/sec.

• If the time interval is in error so that it is 3% longer than the actual time interval, then what are the actual values of the final velocity and acceleration?

answer/question/discussion: ->->->->->->->->->->->-> :sec, vF=19.98m/s^2 a=10.3/sec

• What is the percent error in each?

answer/question/discussion: ->->->->->->->->->->->-> : .1%, 3%

• If the percent error is the same for both velocity and acceleration, explain why this must be so.

answer/question/discussion: ->->->->->->->->->->->-> : Its not.

• If the percent errors are different explain why it must be so.

answer/question/discussion: ->->->->->->->->->->->-> : The error is going to get smaller if you square the unit…I think.

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25min.

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&#Please compare your solutions with the expanded discussion at the link

Solution

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