#$&*
Phy 121
Your 'cq_1_25.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** **
A steel ball of mass 110 grams moves with a speed of 30 cm / second around a circle of radius 20 cm.
• What are the magnitude and direction of the centripetal acceleration of the ball?
answer/question/discussion: ->->->->->->->->->->->-> : ca=30^2/20=45m/s^2
#$&*
• What is the magnitude and direction of the centripetal force required to keep it moving around this circle?
answer/question/discussion: ->->->->->->->->->->->-> : F=6.67e-11*6e24*.110/.02^2=1.1e17
#$&*
** **
10 mins
** **
Your centripetal acceleration is good. Your force equation would apply to an object the mass of the Earth and the .110 kg ball, separated by a distance of 2 cm. It's good that you're thinking about that equation, but it isn't applicable to this problem. The solution is much simpler; I believe you'll understand.
&#See any notes I might have inserted into your document. If there are no notes, this does not mean that your solution is completely correct.
Then please compare your solutions with the expanded discussion at the link
Solution
Self-critique your solutions, if this is necessary, according to the usual criteria. Insert any revisions, questions, etc. into a copy of this posted document. Mark any insertions with &&&& so they can be easily identified.If your solution is completely consistent with the given solution, you need do nothing further with this problem. &#
&#No revision is necessary unless you have a question, or something you want me to review. &#