phy201
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.
** **
seed 25.1
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: ->->->->->->->->->->->-> :
magnitude = v^2/r
= (30cm/s)^2/ 20cm
= 900cm^2/s^2 /20
=45cm/s^2
I know force is .11kg * .45m/s^2 = .0495N
#$&*
What is the magnitude and direction of the centripetal force required to keep it moving around this circle?
answer/question/discussion: ->->->->->->->->->->->-> :
I am not sure
#$&*
** **
about 20 minutes
** **
I know for this problem what the acceleration and the force are, but I am not sure how to get the direction, it seems the direction would be going in a circle 360 degrees??????
The direction is toward the center of the circle. The direction to the center of course depends on where the object is on the circle.
Check the link. No revision is necessary unless you have questions.
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.