You throw a ball off the top of a building at an angle of 30.0° above the horizontal. You release the ball from a point 19.6 m above the ground. If it takes 4.00 s for the ball to hit the ground, how far did it travel horizontally?

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.