course Phy201 cڄ߸J蓅ɲlT~rassignment #004
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13:25:22 Intro Prob 6 given init vel, accel, `dt find final vel, dist If initial velocity is v0, acceleration is a and time interval is `dt, then in symbols what are the final velocity vf and the displacement `ds?
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RESPONSE --> vf = a * `dt + v0 'ds = (vf - v0) * `dt confidence assessment: 1
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13:29:19 **You would use accel. and `dt to find `dv: a * `dt = `dv. Adding `dv to initial vel. vo you get final vel. Then average initial vel. and final vel. to get ave. vel.: (v0 + vf) / 2 = ave. vel. You would then multiply ave. vel. and `dt together to get the distance. For example if a = 3 m/s^2, `dt = 5 s and v0 = 3 m/s: 3 m/s^2 * 5 s = 15 m/s = `dv 15 m/s + 3 m/s = 18 m/s = fin. vel. (18 m/s + 3 m/s) / 2 = 10.5 m/s = vAve 10.5 m/s * 5 s = 52.5 m = dist. In more abbreviated form: a * `dt = `dv v0 + `dv = vf (vf + v0) /2 = vAve vAve * `dt = `ds so `ds = (vf + v0) / 2 * `dt. **
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RESPONSE --> I have that exact same thing for finding final velocity just wrote a little differently. However, I forgot to put my divide by 2 when writing the formula for `ds. But, I have it on paper. self critique assessment: 3
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13:32:03 What is the displacement `ds associated with uniform acceleration from velocity v0 to velocity vf in clock time `dt?
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RESPONSE --> `ds = (vf + v0)/2 * `dt or `ds = 1.5*v0 * `dt confidence assessment: 2
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13:32:52 ** Since accel is uniform vAve = (v0 + vf) / 2. Thus displacement is `ds = vAve * `dt = (v0 + vf) / 2 * `dt, which is the first equation of uniformly accelerated motion. **
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RESPONSE --> ok self critique assessment: 3
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13:33:38 Describe the flow diagram we obtain for the situation in which we know v0, vf and `dt.
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RESPONSE --> I don't understand what this question wants! confidence assessment: 0
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13:34:32 ** The first level in the diagram would contain `dt, v0 and vf. Then v0 and vf would connect to `dv in the second level. The second level would also contain vAve, connected from vf in the first level to v0 in the first level. The third level would contain an a, connected to `dv in the second level and `dt in the first level. The third level would also contain `ds, connected to vAve in the fourth level and `dt in the first level. **
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RESPONSE --> Is this the graphical representations that you put on the bottom of some of the assignments? self critique assessment: 0
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13:35:31 Query Add any surprises or insights you experienced as a result of this assignment.
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RESPONSE --> Did not expect any questions on the ""flow"" of anything. Also the first question is a little confusing in the way it is wrote. confidence assessment: 3
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13:36:03 ** Student Response: I think I really confused what information stood for what in the Force and Pendulum Experiment. However, I enjoy doing the flow diagrams. They make you think in a different way than you are used to. INSTRUCTOR NOTE: These diagrams are valuable for most people. Not all--it depends on learning style--but most. **
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RESPONSE --> They are not valuable for me. self critique assessment: 3
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