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Phy 201
Your 'cq_1_25.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** CQ_1_25.1_labelMessages.txt **
Seed 25 q1
A steel ball of mass 110 grams moves with a speed of 30 cm / second around a circle of radius 20 cm.
• What are the magnitude and direction of the centripetal acceleration of the ball?
answer/question/discussion: ->->->->->->->->->->->-> :
.11kg
V=.3m/s
Ds=.2m
F=v^2r
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F = v^2 r is not valid. Among other things this formula would give you the same result for a grain of sand as for a steel ball, since it doesn't take mass into account.
The centripetal acceleration of an object moving around a circle is
a = v^2 / r.
See if you can use this to answer the questions.
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.3^2 (.2)=.018
F=.018m/s/s *.11
=.00198N
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• What is the magnitude and direction of the centripetal force required to keep it moving around this circle?
answer/question/discussion: ->->->->->->->->->->->->
Im not sure is it the .00198N
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20
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