일반물리학 1 — Gravitation: Problem 53

53 One dimension. In Fig. 13-37, two point particles are fixed on an x axis separated by distance d. Particle A has mass \( m_A \) and particle B has mass \( 25.0 m_A \). A third particle C, of mass \( 75.0 m_A \), is to be placed on the x axis and near particles A and B. In terms of distance d, at what x coordinate should C be placed so that the net gravitational force on particle A from particles B and C is zero?