Phy 121
Your 'cq_1_19.2' 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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Sketch a vector representing a 10 Newton force which acts vertically downward.
• Position an x-y coordinate plane so that the initial point of your vector is at the origin, and the angle of the vector as measured counterclockwise from the positive x axis is 250 degrees. This will require that you 'rotate' the x-y coordinate plane from its traditional horizontal-vertical orientation.
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I wasn’t sure what to put here exactly. I drew a sketch of the situation that was explained but am unsure of if it was done correctly. My sketch resembled this below:
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• What are the x and y components of the equilibrant of the force?
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Of the angle is 250 degrees then I think we solve this by sin(250 deg) and cos(250 deg).
Sin (250 deg) = -.93 or approximately -.9 This needs to be multiplied by 10 to give us -90, but if this is our x coordinate, then would it be positive 90 or does my triangle need to be flipped again???
10 * (-.9) = -9, not -90. The sine gives you the y coordinate, not the x.
250 deg is in the 3d quadrant, closer to the y axis than to the x. So -9 makes good sense.
Cos (250 deg) = -.34 or approximately . This is multiplied by -10 and gives us -30. This makes me think that my triangle really does need to be flipped around.
again you're in the 3d quadrant, so both x and y components are negative; you're closer to the y axis so -3.4 is very reasonable for the x component.
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35 minutes
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Your results are good but you are a little confused on the interpretation and perhaps on the sketch. Check the link.
Submit a revision if you have questions; not necessary if you understand.
&#Please compare your 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. &#