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PHY 121

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 don't yet feel confident with my clicking. I don't feel like the mouse or pad on the

computer are responsive enough and I also don't trust my reaction time.

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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 tried this out on the stop watch. I clicked start then stop. It took .33 seconds.

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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 think that when the time between events is longer, your brain has time to reset and

get ready for the next click. When the time between events gets smaller, I get nervous

about quick clicks.

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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 had a lot of trouble with that. When I just watched it, it went so fast that I wasn't

sure of the order of events. However, even when I advanced it slowly, I had a lot of

trouble figuring out what was happening when. The movements of the ball and pendulum

were blurry. When I listened to it, I did somewhat better, but was still not feeling

certain about what was happening and when it was happening.

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