asst 7

course Phy 121

?t??r?????w????c?y?assignment #007

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007. `query 7

Physics I

06-21-2007

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15:03:47

Describe the flow diagram you would use for the uniform acceleration situation in which you are given v0, vf, and `dt.

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RESPONSE -->

i would find the vAve from the given v0 and vf.

then i could find the 'ds which is vAve * 'dt.

then acceleration is equal to 'dv/dt

confidence assessment: 3

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15:05:12

Describe the flow diagram you would use for the uniform acceleration situation in which you are given `dt, a, v0

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RESPONSE -->

from knowing 'dt, a, v0, you find out what vf is and then you can get a from 'dv/'dt

confidence assessment: 2

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15:06:32

Explain in detail how the flow diagram for the situation in which v0, vf and `dt are known gives us the two most fundamental equations of motion.

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RESPONSE -->

if we know v0 and vf, we can get vAve and 'dv

'ds=vAve * 'dt

aAve=vAve * 'dt

confidence assessment: 2

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15:08:09

qaExplain in detail how the flow diagram for the situation in which v0, a and `dt are known gives us the third fundamental equations of motion.

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RESPONSE -->

we know then to find 'ds

'ds=v) 'dt + .5a 'dt^2

self critique assessment: 1

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15:09:17

Why do we think in terms of seven fundamental quantities while we model uniformly accelerated motion in terms of five?

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RESPONSE -->

we have got too more quantites because in some cases you have to find the answer using averages, therefore we have vAve and aAve

confidence assessment: 2

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15:10:43

Accelerating down an incline through a given distance vs. accelerating for a given time

Why does a given change in initial velocity result in the same change in final velocity when we accelerated down a constant incline for the same time, but not when we accelerated down the same incline for a constant distance?

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RESPONSE -->

starting at a different velocity would impact the acceleration, maybe not the accel rate but it would impact the speed

confidence assessment: 1

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Good responses. Let me know if you have questions. &#