An athlete is accelerating uniformly from an initial velocity of 0 m/s to a final velocity of 4.2 m/s2 in 3 seconds. Calculate his acceleration. Let the direction that the athlete is running in be the positive direction.

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.