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    Reading a Potiential Energy Curve

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    A single conservation force F(x) acts on a 1.0 kg particle that moves along an x-axis. The potential energy U(x) associated with F(x) is given by:
    U(x) = -4x e^(-x/4) J,
    where x is in meters. At x = 5.0m the particle has a kinetic energy of 2.0J.
    a) What is the mechanical energy of the system?
    b) Make a plot of U(x) as a function of x for 0 ≤ x ≤ 10 m, and on the same graph draw the line that represents the mechanical energy of the system
    c) Use part b to find least value of x
    d) Use part b to find greatest value of x between which the particle can move.
    e) Use part b to determine the maximum kinetic energy of the particle
    f) Find the value of x at which maximum kinetic energy occurs.
    g) Determine the equation for F(x) as a function of x.
    h) For what (finite) value of x does F(x) = 0?

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