Figure shows a graph of potential energy U versus positionz of a 2.0 kg particle that can travel only along an z axis under action of a conservative force. In unit-vector notation, what is the force F, on the particle when it is located at I=2 m? U(I) 6. 2. x(m) ol 12 3 4 6 7 8 Select one: O F (-4N)j O F-(-2N)i O F-(4N)i
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