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phy121
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: ->->->->->->->->->->->-> :
M = .11 kg, spped = .3 m/sec, r = .2 meters (after converstions)
A = v^2/r = (.3m/sec)^2 /.2 m = .45 m/sec^2 towards the center
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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: ->->->->->->->->->->->-> :
force = m*a
=.11 kg * .45m/sec^2=.0195 newtons. Inward motion of force keeps the object moving towards the center.
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10 minutes
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