Phy 121
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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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