Phy 231
Your 'cq_1_6.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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For each situation state which of the five quantities v0, vf, `ds, `dt and a are given, and give the value of each.
• A ball accelerates uniformly from 10 cm/s to 20 cm/s while traveling 45 cm.
v0, vf, and ds are given. v0 is 10cm, vf is 20cm and ds is 45 cm.
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• A ball accelerates uniformly at 10 cm/s^2 for 3 seconds, and at the end of this interval is moving at 50 cm/s.
Acceleration, time, and final velocity are given. A = 10 cm/s/s, t = 3, and vf = 50cm/s.
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• A ball travels 30 cm along an incline, starting from rest, while accelerating at 20 cm/s^2.
Distance, initial velocity, and acceleration are given. Distance is 30 cm, initial velocity is 0cm/s, and acceleration is 20cm/s/s.
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Then for each situation answer the following:
• Is it possible from this information to directly determine vAve?
In the first problem, vAve can be determined since v0 and vf are given. vAve would be 15cm/s in this case. In the second problem, you can find vAve by first finding the initial velocity from the acceleration equation. Then you average that with the final velocity. vAve is 35cm/s in this case. You cannot find the vAve in the third problem because you do not have enough information.
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• Is it possible to directly determine `dv?
It is easy to determine dv for the first problem because vf and v0 are given. Thus dv is 10cm/s for the first problem. In the second problem, they gave vf as 50cm/s and I found v0 as 20cm/s, so dv would be 30cm/s. You cannot find dv in the third problem because not enough information is given.
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25 min
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&#Good work. Let me know if you have questions. &#