A 1 kg rock is suspended by a massless string from one end of a 5 m measuring stick. 0 1 2 3 4 5 1 kg What is the mass of the measuring stick if it is balanced by a support force at the 1 m mark

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.