(a) Derive an expression for the potential energy of an object subject to a force Fx =
Chapter 7, Problem 49(choose chapter or problem)
(a) Derive an expression for the potential energy of an object subject to a force Fx = ax - bx 3 , where a = 5 N/m and b = 2 N/m3 , taking U = 0 at x = 0. (b) Graph the potentialenergy curve for x 7 0 and use it to find the turning points for an object whose total energy is -1 J.
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