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Universal Gravitation C H A P T E R O U T L I N E 13.1 Newton’s Law of Universal Gravitation 13.2 Measuring the Gravitational Constant 13.3 Free-Fall Acceleration and the Gravitational Force 13.4 Kepler’s Laws and the Motion of Planets 13.5 The Gravitational Field 13.6 Gravitational Potential Energy 13.7 Energy Considerations in Planetary and Satellite Motion ▲ An understanding of the law of universal gravitation has allowed scientists to send spacecraft on impressively accurate journeys to other parts of our solar system. This photo of Chapter 13 389 |