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. (a) `35J`B. (b) `64J`C. (c) `86J`D. (d) `49J`

A single conservative force `F(x)` acts on a `1.0-kg` particle that mo

1.	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. (a) `35J`B. (b) `64J`C. (c) `86J`D. (d) `49J`
Answer» Correct Answer - D At ` x=5m`, `U=20+(5-2)^2=29J`, `K=20J` Mechanical energy `=E=U+K=29+20=49J`

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