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course Phy 121
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?
answer/question/discussion:
I think the force would be neutral in relation to the line of motion, not forward or backward.
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Will the object speed up, slow down or maintain a constant speed?
answer/question/discussion:
I believe it will maintain a constant speed.
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You need some justification here.
The object will maintain a constant speed if there is zero net force in its direction of motion. This will occur if the component of the net force in the direction of motion is zero.
Is this the case?
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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:
It would be directed to the left.
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Will the object veer to the right, to the left or maintain straight-line motion?
answer/question/discussion:
the object will veer in the same direction that the force is acting on it, so assuming the force is acting downward, it will cause the object to veer 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?
answer/question/discussion:
The component parallel to the line of motion.
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