#$&*
Phy 201
Your 'cq_1_05.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** **
The problem:
A ball accelerates at 8 cm/s^2 for 3 seconds, starting with velocity 12 cm/s.
• What will be its velocity after the 3 seconds has elapsed?
answer/question/discussion: ->->->->->->->->->->->-> :
8 cm/s2 x 3 sec = 24 cm/s3
#$&*
@& That's the change in velocity, but it's not the velocity the ball attains.*@
• Assuming that acceleration is constant, what will be its average velocity during this interval?
answer/question/discussion: ->->->->->->->->->->->-> :
8 cm/s2 x 3 sec = 24 cm/s3
#$&*
@& It's very good that you're working with the units, and overall you're doing a good job with them.
However cm/s^2 * s = (cm/s^2) * (s / 1) = (cm * s) / s^2 = cm / s.
(cm/s^2) / s would be (cm/s^2) * (1/s) = cm/s^3, but that's not the calculation here.*@
• How far will it travel during this interval?
answer/question/discussion: ->->->->->->->->->->->-> :
12 cm/s x 3 sec = 36 cm/s2
#$&*
@& 12 cm/s is the ball's initial velocity, but it's speeding up.
If it didn't speed up then it would travel 36 cm.
Note that cm/s * s = cm, not cm/s^2.*@
*#&!
@& A revision, and/or questions, would be in order here. You're on the right track, but you need to get a few details straight.*@