PHY 231
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.
** **
Copy the problem below into a text editor or word processor.
• This form accepts only text so a text editor such as Notepad is fine.
• You might prefer for your own reasons to use a word processor (for example the formatting features might help you organize your answer and explanations), but note that formatting will be lost when you submit your work through the form.
• If you use a word processor avoid using special characters or symbols, which would require more of your time to create and will not be represented correctly by the form.
• As you will see within the first few assignments, there is an easily-learned keyboard-based shorthand that doesn't look quite as pretty as word-processor symbols, but which gets the job done much more efficiently.
You should enter your answers using the text editor or word processor. You will then copy-and-paste it into the box below, and submit.
________________________________________
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: ->->->->->->->->->->->-> :
Work Shown:
- Remember that velocity is expressed as cm/ s
- On a time interval at, 0 seconds, the ball is already traveling at 12 cm/ s
- The rate the velocity changed is at 8 cm/ s^2
Change in Velocity = ( 8 cm/ s^2 )* ( 3 s ) = 24 cm/ s
'dv = 24 cm/s
24 cm/ s + 12 cm/ s = 36 cm/ s
After 3 seconds, the ball's velocity is 36 cm/s.
#$&*
• Assuming that acceleration is constant, what will be its average velocity during this interval?
answer/question/discussion: ->->->->->->->->->->->-> :
It's average velocity would therefore be 24 cm/ s.
Calculation:
(( Final + Initial ) / 2 ) = Average Velocity ( Ave. Vel. )
(( 36 cm/ s + 12 cm/s ) / 2) = Ave. Vel.
(( 48 cm/ s ) / 2 ) = Ave. Vel.
( 24 cm/ s ) = Ave. Vel.
#$&*
• How far will it travel during this interval?
answer/question/discussion: ->->->->->->->->->->->-> :
During this three second interval, the ball would travel 72 cm.
Calculations:
Ave. Vel. * Time Interval = Distance
24 cm/ s * 3 s = 72 cm
#$&*
________________________________________
Copy and paste your work into the box below and submit as indicated:
** **
15 minutes
** **
&#Very good work. Let me know if you have questions. &#