Why Is Gravitational Potential Energy Negative? AP Physics 1
Why is gravitational potential energy negative? And how do we calculate the total potential energy of a system containing more than two masses? In this video, we build the answer from first principles. Starting with the familiar two-body gravitational potential energy equation, we develop the intuition behind the negative sign using external work and controlled motion. Then, using a step-by-step assembly process, we derive the total gravitational potential energy of a 3-mass system by summing individual pairwise interactions. Topics covered: Gravitational potential energy Why potential energy is negative External work and controlled assembly Pairwise interaction method 3-mass systems Work-energy concepts in gravity Ideal for: IB Physics AP Physics Introductory university mechanics #physics #ibphysics #gravitationalpotentialenergy #mechanics
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