The Potential Energy of a Particle Is Given by U(x)

Multiple Choice

The potential energy of a particle is given by U(x) = (9 J/m⁴) x⁴ - (8 J/m²) x². At what value of x would the particle be in unstable equilibrium?

A) 2/3 m
B) m
C) -2/3 m
D) 0 m
E) - m