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py 231
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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: ->->->->->->->->->->->-> :
a = v^2 / r toward the center
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: ->->->->->->->->->->->-> :
Fcent = Fnet
Fcent = m * a = .110kg * .45 m/s^2 = .0495 N towards the center
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&#This looks very good. Let me know if you have any questions. &#