#$&*
PHY 201
Your 'cq_1_17.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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SEED Question 17.1
A steel ball rolls down a ramp and collides with a marble, as in the video. The marble is slightly smaller and quite a bit less massive than the ball.
• If they both experience the same force, which will have the greater acceleration?
answer/question/discussion: ->->->->->->->->->->->-> :
Given:
M = steel ball
A = for steel ball
m = smaller ball
a = for smaller ball
F = m * a = M * A, the smaller ball will have the greater acceleration.
@& Good, but this conclusion can be reached without formulas.
Forces are the same. Since a = F / m, the lesser mass experiences the greater acceleration.
The forces would in fact be equal and opposite, but when stating this problem I chose not to add the distraction of signs.
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#$&*
• If the forces were exerted during identical time intervals, which would have the greater change in velocity?
answer/question/discussion: ->->->->->->->->->->->-> :
F = dp / dt
dp = F / dt = m * change in velocity = M * change in velocity
The smaller ball will also have the greater change in velocity.
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10 mins
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SEED Question 17.1 submitted 6 Mar 11 around 2:12 AM.
@& Well done, and you are in a postion to benefit from the discussion in the link below. No revision is needed unless you have questions.*@
&#See any notes I might have inserted into your document, and before looking at the link below see if you can modify your solutions. If there are no notes, this does not mean that your solution is completely correct.
Then please compare your old and new solutions with the expanded discussion at the link
Solution
Self-critique your solutions, if this is necessary, according to the usual criteria. Insert any revisions, questions, etc. into a copy of this posted document. Mark any insertions with &&&& so they can be easily identified.If your solution is completely consistent with the given solution, you need do nothing further with this problem. &#