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PHY 201
Your 'cq_1_19.3' 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 19.3
An object moving in the direction 120 degrees (as measured counterclockwise to the positive x axis) encounters a net force whose direction is 270 degrees.
• Sketch the force and its component along the line of motion, as well as its component perpendicular to the line of motion.
answer/question/discussion: ->->->->->->->->->->->-> :
magnitude = sqrt ( (x coordinate)^2 + (y coordinate)^2 )
c^2 = 120 deg^2 + 270 deg^2
c^2 = 14400 deg + 72900 deg
c^2 = 87300
c = sqrt (87300)
c = 295 deg
x coordinate = magnitude * cos(angle)
x coordinate = 295 deg * cos (120 deg) = -147.5 deg
y coordinate = magnitude * sin(angle)
y coordinate = 295 deg * sin (120 deg) = 255 deg
(-147.5 deg, 255 deg)
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• Suppose you are facing in the direction of motion. Do you perceive the component of the force along the line of motion to be forward or backward? Is this component in the direction of motion or opposite to the direction of motion?
answer/question/discussion: ->->->->->->->->->->->-> :
backwards
The component is in the direction of motion.
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• Will the object speed up, slow down or maintain a constant speed?
answer/question/discussion: ->->->->->->->->->->->-> :
I don’t understand
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• If you are facing in the direction of motion, then the line perpendicular to the direction of motion will run to your right and to your left. Is the component of the force perpendicular to the line of motion directed to the right or to the left?
answer/question/discussion: ->->->->->->->->->->->-> :
I don’t understand. I will have to get more clarification.
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• Will the object veer to the right, to the left or maintain straight-line motion?
answer/question/discussion: ->->->->->->->->->->->-> :
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• Which is greater in magnitude, the component of the force along the line of motion or the component perpendicular to the line of motion?
answer/question/discussion: ->->->->->->->->->->->-> :
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25 min
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SEED Question 19.3 submitted 11 Mar 11 around 11:42 PM.
&#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. &#