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homo-sapiens
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Homework Statement
A 205 g cube slides down a ramp starting from rest as shown in the figure below. The ramp has a 46° slope. After falling a distance of 92 cm, the cube strikes a spring of spring constant
k = 21 N/m.
Find the maximum compression of the spring when the coefficient of kinetic friction between the cube and the ramp is 0.13.
http://puu.sh/bTjhN/ed172bac4f.png [Broken]
2. Homework Equations
conservation of energy laws
f=ma
The Attempt at a Solution
I solved for work of friction, the work of gravity and the work of spring (d is vertical distance of 92cm and x is the distance of compression)[/B]
http://puu.sh/bTjoU/221afafc3f.png [Broken]
I then used the conservation of energy law to piece together my 3 equations
http://puu.sh/bTjw6/e9c0236b16.png [Broken]
apparently my equation didn't match with the answer's. Can someone please tell me why?? and what did I miss??
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