A repulsive force of 2000 N is separating two identical negative charges. If the distance between them is 0.025 m, calculate the size of each charge

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.