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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.
This information gives the initial (10cm/s) and final(20cm/s) velocities and the change in distance(45cm)
The last quantity would be change in position. Distance is an absolute value while position is a signed quantity, so change in distance and change in position could be very different quantities.
answer/question/discussion:
• 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.
This information gives the change in time(3s) and final velocity(50cm/s)
also the acceleration
answer/question/discussion:
• A ball travels 30 cm along an incline, starting from rest, while accelerating at 20 cm/s^2.
This information gives the change in distance(30cm), the initial velocity(0cm/s)
also the acceleration
answer/question/discussion:
Then for each situation answer the following:
• Is it possible from this information to directly determine vAve?
Yes, Yes,no the last problem requires an equation to find the vAve
answer/question/discussion:
• Is it possible to directly determine `dv?
Yes,no, no the first one is the only that provides the information to directly determine ‘dv.
answer/question/discussion:
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15 mins
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Would like to have feedback. Thanks, Joshua
Good, but you failed to identify the acceleration when it was among the given quantities.
&#Let me know if you have questions. &#