phy 201
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.
** **
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: ->->->->->->->->->->->-> :
average velocity = 10 cm/s
final velocity = 20 cm/s
acceleration = 10 cm/s^2
• 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: ->->->->->->->->->->->-> :
average velocity = 9.7 cm/s
final velocity = 19.4 cm/s
acceleration = 9.4 cm/s^2
• What is the percent error in each?
answer/question/discussion: ->->->->->->->->->->->-> :
average velocity = 3%
final velocity = 6%
acceleration = 6%
• If the percent error is the same for both velocity and acceleration, explain why this must be so.
answer/question/discussion: ->->->->->->->->->->->-> : The percent error is applied to the equations twice in the velocity as well as the acceleration equations, resulting in different numbers but equal percent errors.
• If the percent errors are different explain why it must be so.
answer/question/discussion: ->->->->->->->->->->->-> : N/A
** **
20 minutes
** **
&#Very good responses. Let me know if you have questions. &#