Solve the all parts of given question:
Question: The potential energy function for a particle within a system is given by U(x) = -x3 + 2x2 + 3x, where x is the position of the particle in meters and U is in joules.
Part A: What is the force Fx acting on the particle as a function of x?
Part B: For what values of x is the force equal to zero?
Please, try to give explanation for above question. Thanks.