Can you check my physics homework please?

AI Thread Summary
The discussion revolves around a physics homework project that involves predicting the time it takes for a ball to slide down a surface and calculating the coefficient of friction. The poster expresses uncertainty about their calculations, particularly regarding the relationship between frictional force and net force. They mention obtaining a coefficient of friction of approximately 0.4, which they feel is low given the time differences observed. The poster requests feedback on their calculations and emphasizes the need for clarity in the problem statements. Accurate calculations and understanding of the physics concepts are crucial for successful completion of the project.
athena810
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Can you check my physics homework please??

Homework Statement


My physics project includes predicting
(1) the time it takes a ball to go down a slide
http://i.imgur.com/TfQI87H.png
I'm not sure if it's right though.

(2) finding the coefficient of friction between me and the slide.
http://i.imgur.com/3P8FPOe.png

Calculations should be correct for the most part, I'm just not sure if I'm doing stuff right. Particularly, I'm not sure about where it goes ff = fa - fnet because then i found the coefficient to be like .4 and that seems really little considering how the differences in times were a lot more.
 
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You need to post the actual questions, preferably word-for-word.
 

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