What is required for an electric charge to flow through a wire? zero resistance in the wire
a balance of electric potential
high resistance in the wire
a difference in electric potentia

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.