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.
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30 min
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The problem:
A ball starts with velocity 0 and accelerates down a ramp of length 30 cm, covering the distance in 5 seconds.
What is its average velocity?
answer/question/discussion:
We take the Ave. of intial and final velocity.
30cm/5s=
6cm/s
If the acceleration of the ball is uniform then its average velocity is equal to the average of its initial and final
velocities.
answer/question/discussion:
correct. intial average and final vlocities will be spaced equally
You know its average velocity, and you know the initial velocity is zero. What therefore must be the final velocity?
answer/question/discussion:
Since it is a uniformaly acc. object the final velocity will be double the average velocity.
6cm/s*2=
12cm/s
By how much did its velocity therefore change?
answer/question/discussion:
12cm/s from intial velocity and 6cm/s from midpoint velocity(2.5s)
At what average rate did its velocity change with respect to clock time?
answer/question/discussion:
If we take the rise and divide by run we get the slope or the average rate at which velocity changes
12cm/s/5=
2.4cm/s^2
What would a graph of its velocity vs. clock time look like? Give the best description you can.
answer/question/discussion:
It would be a straight line starting from the x,y axis increasing at a constant rate
&#Your work looks very good. Let me know if you have any questions. &#