#$&*
phy121
Your 'cq_1_01.2' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** CQ_1_01.2_labelMessages **
The problem:
Answer the following:
• How accurately do you think you can measure the time between two events using the TIMER program?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
I would think the accuracy would be to about .0001 of a second using the timer program.
#$&*
@&
The program wouldn't be repeating time intervals very often, if at all, if it was this accurate.
*@
• What is the shortest time interval you think you would be able to measure with reasonable accuracy?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
I believe reasonable accuracy would be .01 of a second.
#$&*
@&
That's about the level of accuracy that's consistent with the numberf of repeated intervals usually observed.
However a human being would not be able to trigger a time interval this short (couldn't click twice in .01 second, and couldn't in any case perceive an interval that short with any accuracy).
*@
• How does the percent error in timing intervals change as the time between the events gets smaller?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
I believe the percent error would increase as the events get smaller. The error from the timer experiment seems higher when the events happened within fractions of seconds than when the events were several seconds apart.
#$&*
@&
Right. Below a second it's hard to respond to start and stop signals with enough accuracy to get reliable results, and as intervals approach .2 second we're lost just trying to click that fast.
*@
• How accurately are you able to measure the positions of the ball and the pendulum in the initial video?
answer/question/discussion: ->->->->->->->->->->->-> (start in the next line):
I feel like I could measure the positions of the pendulum to an accuracy of about half an inch by pausing the video.
#$&*
*#&!*#&!
&#Good responses. See my notes and let me know if you have questions. &#