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September 19, 2014

September 19, 2014

Posted by **Harold** on Monday, March 16, 2009 at 7:37pm.

I get 2.4J am I wrong, if so please help in showing hoe this process woorks out. It would be much appreciated.

- Physics -
**drwls**, Monday, March 16, 2009 at 11:51pmCompute the stored energy in the compressed spring. It is (1/2)k x^2 = 11.75 J. The work done againt friction going to the top of the incline is

W = 3.8N*cos 30*Uk*X = 3.70 J

The work done against gravity going to the top is

3.8N*s1n 30 * X = 4.28 J

The remaining kinetic energy is 3.77 J

Round it off to 3.8

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