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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 **
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 = 110 g * (0.001 kg / 1 g) = 0.11 kg, v = 0.3 m/s, radius = 0.2 m.
a = v^2 / r = (0.3 m/s)^2 / 0.2 m = 0.45 m/s^2
The centripetal acceleration is directed towards the center of the radius, at least thats what I thought.
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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 = m a = 0.11 kg * 0.45 m/s^2 = 0.24 N
The direction of the centripetal force acts in the same direction as the centripetal acceleration, towards the center of the radius.
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10 mins
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&#Very good responses. Let me know if you have questions. &#