Can you check my physics homework please?

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SUMMARY

This discussion focuses on a physics homework project involving two main tasks: predicting the time it takes for a ball to slide down a ramp and calculating the coefficient of friction between the ball and the slide. The user expresses uncertainty regarding the calculations, particularly the application of the formula ff = fa - fnet, leading to a coefficient of friction of approximately 0.4. The user seeks verification of their calculations and clarity on the physics concepts involved.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with the concepts of friction and coefficients of friction
  • Basic knowledge of kinematics and motion equations
  • Ability to interpret and analyze physics problems
NEXT STEPS
  • Review the principles of Newton's laws of motion
  • Study the calculation of coefficients of friction in various scenarios
  • Learn about kinematic equations related to motion on inclined planes
  • Explore practical experiments to measure friction and acceleration
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Students studying physics, educators looking for homework verification methods, and anyone interested in understanding the dynamics of motion and friction in practical applications.

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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