Aforce of 200 n is required to keep an object sliding at a constant speed of 2 m/s across a rough floor. how much power is being expended to maintain this motion?

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Simple machines can a. increase force only b. decrease force only c. increase or decrease force

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.