4.0 A force F(x) = N acts on a particle as it moves along the positive x-axis. (a) How much work (in J) does the force do on the particle as it moves from x = 2.5 m to x = 5.2 m? 2.93 (b) Picking a convenient reference point of the potential energy to be zero at x = 1 m, find the potential energy for this force. (Use the following as necessary: x. Assume U(x) is in joules an x is in meters. Do not include units in your answer.) U(x) = -2.93

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