Phy 201
Your 'cq_1_03.1' 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 starts with velocity 0 and accelerates uniformly down a ramp of length 30 cm, covering the distance in 5 seconds.
* What is its average velocity?
answer/question/discussion: ->->->->->->->->->->->-> n:
The ball is traveling at an average velocity of 6cm/second. I get this by dividing the displacement (30cm) by the time (5 sec).
* If the acceleration of the ball is uniform then its average velocity is equal to the average of its initial and final velocities.
You know its average velocity, and you know the initial velocity is zero.
What therefore must be the final velocity?
answer/question/discussion: ->->->->->->->->->->->-> on:
In the case of the information you gave me above, I would say that the final velocity should be 12cm/second. I say this because if the average between the initial and final velocities are supposed to equal the average velocity, then (0cm/sec + 12cm/sec)/2 = 6cm/second which is the average velocity.
* By how much did its velocity therefore change?
answer/question/discussion: ->->->->->->->->->->->-> on:
From the answer I got, the velocity changed 2x than that of the average velocity.
* At what average rate did its velocity change with respect to clock time?
answer/question/discussion: ->->->->->->->->->->->-> on:
I believe the rate its velocity changed with respect to clock time was 2.4cm/sec / second. I get this by taking the difference of the initial and my final velocity, and dividing that by the differnece between the start and stop time. So (12cm/sec - 0cm/sec)/(5sec -0sec) = 2.4cm/sec / second.
* What would a graph of its velocity vs. clock time look like? Give the best description you can.
answer/question/discussion: ->->->->->->->->->->->-> scussion:
Well from what I remember about a uniform increase, that should mean it increases in a straight line. So, the graph should look like a straight line coming from the origin and continuing with a slope around 6/1.
** **
This assignment took me about 30 minutes to complete.
** **
&#Very good work. Let me know if you have questions. &#