phy201
Your 'cq_1_26.1' 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 26.2
A simple pendulum has length 2 meters. It is pulled back 10 cm from its equilibrium position and released. The tension in the string
is 5 Newtons.
Sketch the system with the pendulum mass at the origin and the x axis horizontal.
answer/question/discussion: ->->->->->->->->->->->-> :
So the sketch would have the pendulum hanging from a string length of 2 meters. In the horizontal direction the pendulum would be
pulled back 10 cm and released giving a force that swings the pendulum from equilibrium to opposite postion and back to equilibrium.
The tension is on the string 5 newtons with gravity acting on it vertically downward.
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Sketch a vector representing the direction of the pendulum string at this instant. As measured from a horizontal x axis, what is the
direction of this vector? (Hint: The y component of this vector is practically the same as the length; you are given distance of the
pullback in the x direction. So you know the x and y components of the vector.)
answer/question/discussion: ->->->->->->->->->->->-> :
The dirction of the pendulum string is vertical 90 degrees from the horizontal
so The direction of this vector is y=2 sin (90degrees)
The pendulum is pulled back from vertical so it isn't at 90 degrees with horizontal.
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What is the direction of the tension force exerted on the mass?
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The direction of tension force exerted on the mass is in vertical position
t= 5n sin (90)
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What therefore are the horizontal and vertical components of the tension?
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What therefore is the weight of the pendulum, and what it its mass?
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What is its acceleration at this instant?
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about 45 minutes
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I am really confused on this one, I somewhat understood the problems in query 25.2,and tried to compare the answer to come up with a solution but I am really confused on how to work these.
The discussion at the link should clarify this for you. You should submit a revision.
&#Please compare your solutions with the expanded discussion at the link
Solution
Self-critique your solutions, if this is necessary, according to the usual criteria. Insert any revisions, questions, etc. into a copy of this posted document. Mark any insertions with &&&& so they can be easily identified. &#