A bullet of mass 10 g travelling at 600 ms^-1 hits the hero of a western film in the chest and ricochets off the bible his momma gave him before he
left to herd cattle. The bullet is now travelling at 45 ms^-1 and the man
staggers back at a speed of 0.12 ms^-1. What is the mass of the cowboy?

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.