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A single conservative force F(x) acts on...

A single conservative force `F(x)` acts on a `1.0-kg` particle that moves along the x-axis. The potential energy `U(x)` is given by `U(x)=20+(x-2)^2` where x is in meters. At `x=5.0m`, the particle has a kinetic energy of `20J`.
What is the mechanical energy of a system?

A

zero

B

20 J

C

29 J

D

49 J

Text Solution

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The correct Answer is:
D
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