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 in the direction of motion, as well as its component perpendicular to the direction of motion.
answer/question/discussion:
I’m not sure what you mean by “and its component”. I draw the line from the origin (0,0) straight down since the force has a direction of 270 degrees it will be right on the negative y axis. A line perpendicular to this line will be parallel to the x axis.
Suppose you are facing in the direction of motion. Do you perceive the component of the force in the direction of motion to be forward or backward? It this component in the direction of motion or opposite to the direction of motion?
answer/question/discussion:
Facing in the direction of which motion, the motion of the object or the motion of the force? I assume the motion of the object. Therefore I perceive the direction of the motion of the force to be mostly backwards, it is certainly moving away from me and is behind me, but a bit to my left. I can’t figure out the second question. The force is not in the direction of my motion (if I am the object, but it isn’t really opposite to my direction either. I’m at 120 degrees, not 90 degrees.
Will the object speed up, slow down or maintain a constant speed?
answer/question/discussion:
The object is not going to speed up, but I’m not sure if it will slow down or maintain a constant speed, either way, it is going to change directions itself. My instinct is that it is going to maintain it’s speed.
If you are facing in the direction of motion, then the directions perpendicular to the direction of motion will be to your right and to your left. Is the component of the force perpendicular to the direction of motion to the right or to the left?
answer/question/discussion:
No, the force is not perpendicular to the direction of motion of the object.
Will the veer to the right, to the left or maintain straight-line motion?
answer/question/discussion:
The object will veer to the left.
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
No idea…I am so lost on this one.
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40 mins
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I think I need a picture to visualize this one. I have drawings all over my paper from trying to figure it out.
You are doing well with vectors. I’ve delayed responding to this one in hopes that I can develop a short video explanation; I still intend to do so but am just getting my lab set up after being dislocated for a semester. If you don’t hear anything within a couple of days, email me. You can in the meantime proceed with subsequent assignments.