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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.
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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 = 110g
30 cm/s
R = 20cm
Magnitude?
A = v^2 / r
A = (30)cm/s^2 / 20 cm = 45 cm/s^2
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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: ->->->->->->->->->->->-> :
.110kg * 45 cm/s^2 = 4.95 kgm/s^2 or 4.95 J
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That would be 4.95 N, not 4.95 J.
Very easy to type the wrong unit. I've caught myself doing it on occasion.
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