identical stars, at the vertices of an equilateral triangle, Three orbit about their common center of mass (Figure 1). Part A Find the period of this orbital motion in terms of the orbital radius, R. and the mass of each star, M. Express your answer in terms of the variables R, M, and appropriate constants. Η ΑΣΦ ↑ O ?

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Central Force

Central force is the force that acts along the center of mass of one body to the center of mass of another body. Its direction from or away from a point on a body to another is called the center of the force. Such forces include gravitational force between two massive objects or electrostatic forces between two charged particles. So from atoms to planets, the central forces play an important role in shaping our daily lives. One of the remarkable features of central forces is that they are conservative, i.e. the total energy of a central force system can always be expressed as a gradient of a potential energy function.