phy201
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
5cm=?N
tau= f* r
tau = 3N * .15m= .45
.45= N * .05cm
n= 9N
#$&*
Once both of these forces are in place and the system is stationary, what (if anything) will happen if the glue holding the die to the
tabletop comes loose?
answer/question/discussion: ->->->->->->->->->->->-> :
The strap will move in the direction of force of the rubber bands.
#$&*
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Copy and paste your work into the box below and submit as indicated:
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about 20 mins
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&#Very good responses. Let me know if you have questions. &#