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phy 121
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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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: ->->->->->->->->->->->-> :
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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? It this component in the direction of motion or opposite to the direction of motion?
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From what I can distinguish 120 degrees and 270degrees on a graph will be about opposite each other. If im facing the direction of motion of the 120 degrees the 270 degrees will be in front of me, which means it will be going opposite the direction of motion, which of course it would have to be if the two were to collide.
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• Will the object speed up, slow down or maintain a constant speed?
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Depending on the transfer of energy the object would most likely encounter a change in velocity which would be less than the initial velocity since the energy gained after the collision would be less than before collision except in an ideal situation where no energy is lost to nonconservative forces.
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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?
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The weight of the object would be directed toward the right if my orientation is correct since im facing 270 degrees which on a coordinate system would have me looking down an incline. So to my right would be down the coordinate system which would account for the objects weight.
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• Will the object veer to the right, to the left or maintain straight-line motion?
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This will depend on the nature of the collision and how the energy is transferred, ideally if the forces exert equal and opposite each other they will both change their direction of motion veering neither to the right nor left.
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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?
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My difficulties in visualizing the graph described may hinder my ability to answer this question, I’ll wait and make sure im on the right track before attempting this one.
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You definitely want to sketch this one.
&#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. &#
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