Basically, an object moves along a straight line (starting at rest) and reaches a maximum kinetic energy at .7 m. At 0 meters, the potential energy is 4 J and at .7 meters, the potential energy is -2 J. What is the maximum kinetic energy?(adsbygoogle = window.adsbygoogle || []).push({});

I know that the answer is 4 J. However, it would seem to me that the change in kinetic energy is equal to the negative potential energy.

[tex]\Delta K=K_f-K_i=K_f[/tex]

[tex]-U=\Delta K=2[/tex]

This seems that the kinetic energy is 2. Where am I going wrong?

Thanks for the help.

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# Homework Help: Potential vs. Kinetic Energy

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