Circular Motion Help: Solving Homework Equations

AI Thread Summary
The discussion focuses on understanding circular motion, specifically the concepts of centripetal acceleration and centripetal force. Key points include the need to determine the direction of these forces and the relationship between velocity and circular motion. The participant expresses confusion about calculating velocity and applying the formulas for centripetal force. They also mention the importance of understanding the effects of changing time periods on motion. Overall, the thread highlights the challenges faced in grasping the fundamentals of circular motion and the associated equations.
Paulo2014
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Homework Statement


The problem is shown in the attachment.


Homework Equations





The Attempt at a Solution



I have no idea how to answer these questions as I was absent at the time so could someone please explain to me how to work these out please?
 

Attachments

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Clues:


a) They are asking for the direction of the centripetal acceleration.

b) They are asking for the direction of the centripetal force.

c) If velocity is applied, then it moves at tangent. Something is needed to make it travel in circle.

d) Calculate v using v = \frac{distance (circumference)}{time} and then use formula f = \frac{mv^2}{r}.

e) Think about f = ma. If time period changes then the iron ball may be speeding up.
 
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I don't understand... I'm sorry
 
Paulo2014 said:
I don't understand... I'm sorry
Do you actually understand what is circular motion and what is "centripetal force" ?
 
Paulo2014 said:
I don't understand... I'm sorry


http://www.s-cool.co.uk/topic_quicklearn.asp?loc=ql&topic_id=7&quicklearn_id=1&subject_id=2&ebt=&ebn=&ebs=&ebl=&elc="
 
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