cq_1_251

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PHY 241

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 **

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: ->->->->->->->->->->->-> :

a=v^2/r=.3m/s^2/.2m=0.45m/s^2

direction is 90 deg (at a right angle from the current velocity)

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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: ->->->->->->->->->->->-> :

f=ma=0.45m/s^2*.11kg=0.0495N

direction is 90 deg (at a right angle from the current velocity)

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&#Good responses. Let me know if you have questions. &#