Phy 201
Your 'cq_1_06.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** **
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 = 10cm/s
vf = 20cm/s
`ds = 45cm
#$&*
• A ball accelerates uniformly at 10 cm/s^2 for 3 seconds, and at the end of this interval is moving at 50 cm/s.
answer/question/discussion: ->->->->->->->->->->->-> :
a = 10cm/s/s
`dt = 3 seconds
vf = 50cm/s
#$&*
• A ball travels 30 cm along an incline, starting from rest, while accelerating at 20 cm/s^2.
answer/question/discussion: ->->->->->->->->->->->-> :
`ds = 30cm
v0 = 0cm/s
a = 20cm/s/s
#$&*
Then for each situation answer the following:
• Is it possible from this information to directly determine vAve?
answer/question/discussion: ->->->->->->->->->->->-> :
Average Velocity is determined by vAve = (v0 + vf)/2 or by vAve = `ds/`dt
Situation 1 we can determine vAve because we have v0 and vf
Situation 2 we can determine vAve because we have `ds and `dt
Situation 3 we cannot determine vAve because we only have `ds, v0 and a.
#$&*
• Is it possible to directly determine `dv?
answer/question/discussion: ->->->->->->->->->->->-> :
Change in velocity is can be calculated two ways. `dv = vf – v0 or `dv = a * `dt
Situation 1 we can because we are given v0 and vf.
Situation 2 we can because we have a and `dt
Situation 3 we cannot determine `dv because we only have `ds, v0 and a.
#$&*
** **
30 Minutes
** **
&#Very good work. Let me know if you have questions. &#