Skills for analyzing processes involving electric force and electric potential energy
A 0.40-kg cart with charge +4.0 X 10-5 C starts at rest on a horizontal frictionless surface 0.50 m from a fixed object with charge +2.0 X 10-4 C. When the cart is released, it moves away from the fixed object. (a) How fast is the cart moving when very far (infinity) from the fixed charge? (b) When 2.0 m from the fixed object?
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