A spring with an unstrained length of 0.072 m and a spring constant of 1.9 N/m hangs vertically downward from the ceiling A uniform electric field directed upward fills the region containing the spring. A sphere with a mass of 5.0 * 10"kg and a net charge of +5.0 UC is attached to the lower end of the spring. The spring is released slowly, until it reaches equilibrium. The equilibrium length of the spring is 0.060 m. What is the magnitude of the external electric field? Unstrained spring Spring with charged sphere and electric field Number i 1 Units N/CThe drawings show three charges that have the same magnitude but may have different signs. In all cases the distance d between the charges is the same. The magnitude of the charges is lal =7.1 UC, and the distance between them is d=3.2 mm. Determine the magnitude of the net force on charge 2 for each of the three drawings. 2 (a) F = 141.778125 N (b) F = O N (C) F = i 141.778125 N