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Phy 201
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cq_1_201
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Phy 201
Your 'cq_1_20.1' 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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The problem:
The metal strap used in the Angular Velocity of a Strap experiment is constrained by a vertical push pin to rotate about a hole in a die. The die is glued in place to a massive tabletop. A rubber band is attached to a point 15 cm from the axis and stretched so that it exerts a force of 3 Newtons, directed perpendicular to the rod. If this force is unopposed it will accelerate the system rapidly. You want to attach a second rubber band 5 cm from the axis to prevent the system from rotating.
How much force will that rubber band have to exert?
answer/question/discussion: ->->->->->->->->->->->-> : ->->->->->->->->->->->-> :
15cm*3N=45 N*cm
45N*cm=-5cm*F
-9N=F
|9N|=F
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You can return to this problem after completing the Torques lab and the PHet simulation 9.22 Balancing Act.
If at that point you still don't know how to start, let me know.
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