A force parallel to the x-axis acts on a particle moving along the x-axis. This force is associated with potential energy U(x) given by U(x) = αx4, where α = 0.710 J/m4.
(a) What is the magnitude of the force when the particle is at x = -0.800 m?
(b) What is the direction of the force when the particle is at x = -0.800 m?
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