Some sliding rocks approach the base of a hill with a speed of 12 m/s. The hill rises at 36 degrees above the horizontal and has coefficients of kinetic and static friction of .45 and .65, respectively, with these rocks. Start each part of your solution to this problem with a free-body diagram. (a) Find the acceleration of the rocks as they slide up the hill. (b) Once a rock reaches the highest point, will it stay there or slide downhill? If it stays there, show hy. If it slides down, find its acceleration on the way down.(adsbygoogle = window.adsbygoogle || []).push({});

2. Relevant equationsa(x)=g(sin(degrees)-(kinetic coefficient)(cos degrees)) ??????

3. The attempt at a solutionacceleration= 9.8 (.22)

=2.19 m/s^2

Not sure, how to do the second part, or whether my answer to the first part is right. Thanks for any help.

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# Homework Help: Help with frictional problems

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