Compare the gravitational force on a 31 kg mass at the surface of the earth (with radius 6.4 × 106 m and mass 6 × 1024 kg) with that on the surface of the moon with mass 1 81.3 me and radius 0.27 re . what is the force on the earth? answer in units of n.

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.