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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SEED 20.1
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:
15 cm, 3 N
5 cm, x N
I think the area of the 2 triangles would need to be equal for this to happen
First one:
A = .5(15)(3)
a = 22.5
sECOND:
22.5 = .5(5)x
x=9
Force of 9 Newtons
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 be projected towards you with a Force of 12 Newtons
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15 min
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Solution
This link also expands on these topics and alerts you to many of the common errors made by students in the first part of this course. &#