Explore a challenging physics problem focused on finding the position of zero electric force in a system with two point charges. Learn how to calculate the location where a third charge can be placed to experience no net force, using concepts from electrostatics and vector analysis. Follow along as the instructor works through this problem from the OpenStax College Physics textbook, demonstrating problem-solving techniques and explaining key principles of electric fields and forces. Gain valuable insights into tackling complex physics questions and reinforce your understanding of electrostatic interactions between charged particles.