Phy 201
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.
answer/question/discussion: ->->->->->->->->->->->-> : v0, ‘vf, ‘ds. V0=10cm/sec, vf=20cm/sec, and ‘ds=45cm.
• 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.
answer/question/discussion: ->->->->->->->->->->->-> : a, ‘dt, and vf. A=10cm/sec/sec, ‘dt=3 sec, and vf 50cm/s.
• A ball travels 30 cm along an incline, starting from rest, while accelerating at 20 cm/s^2.
answer/question/discussion: ->->->->->->->->->->->-> : ‘ds, v0, a; ‘ds=30 cm, v0=0cm/sec, and a=20cm/sec/sec.
Then for each situation answer the following:
• Is it possible from this information to directly determine vAve?
answer/question/discussion: ->->->->->->->->->->->-> : For situation one you can determine the average velocity directly by adding initial and final velocity and dividing by 2. For situation 2, you can find average velocity but it would not be directly, you would first have to find v0 by taking acceleration and multiplying it by the ‘dt. This would give the change in velocity and you could subtract it from final velocity. For the third, you can find vave but it would be indirectly again. First you would have to find vf by using acceleration and the change in position to find time change. Position= average velocity*time, so you could find the average velocity that way.
• Is it possible to directly determine `dv?
answer/question/discussion: ->->->->->->->->->->->-> : In the first one they give you vf and v0 so you could find ‘dv by subtracting v0 from vf. In the second problem, you could find v0 by taking acceleration multiplying it by ‘dt which would give the change in velocity and therefore allow you to find v0. Once this is found you can find vf-vo. For the third situation, you cannot really directly find vf without using an equation.
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20 mins
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&#Your work looks very good. Let me know if you have any questions. &#