Here is the given problem:(adsbygoogle = window.adsbygoogle || []).push({});

http://img213.imageshack.us/img213/6781/problemtk6.jpg [Broken]

Here is my incorrect solution:

http://img152.imageshack.us/img152/6698/solutionzm3.jpg [Broken]

Why should distance even matter for the final velocity in this problem since once the spring is uncompressed, the cart will continue at a steady velocity forever since there is no friction or air resistance?

The answer for (a) is 1.47 m/s, and the answer for (b) is 1.35 m/s. Again, why would the velocity be less for part (b) when there is no energy loss from either friction or air resistance?

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# Homework Help: How to solve for final velocity of object pushed by spring using concept of engergy

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