Work, kinetic and potential energy, and power: the bookkeeping that solves problems forces make hard.
Energy Transformations: Skate Ramp Work, Energy & Power Energy Diagrams: Reading Motion Off a Potential Curve Pendulum: 1D Small-Angle → 2D Nonlinear → 3D Spherical Bungee Jump: Free Fall Into a One-Sided Spring Loop-the-Loop Block, Spring, and Friction Ballistic Pendulum Sliding on a Circular Path Work on a Whirling Mass Block Sliding on a Sphere Beads on a Hanging Ring Damped Oscillation (Coulomb Friction) Oscillating Block and Putty Falling Chain Dropped Soldiers Lennard-Jones Potential Bead and Gravitating Masses Particle and Two Forces Sportscar Power Snowmobile and Hill Leaper Sand and Conveyor Belt Coil of Rope Work Done on a Crate Work on a Backpack Does the Earth Do Work on the Moon? Using the Dot Product Work Done on a Spring Force as a Function of x Kinetic Energy and Work on a Baseball Work on a Car, to Increase Its Kinetic Energy Work to Stop a Car A Compressed Spring Potential Energy Changes for a Roller Coaster Determine F from U Falling Rock Roller-Coaster Car Speed Using Energy Speeds on Two Water Slides Pole Vault Toy Dart Gun Two Kinds of Potential Energy A Swinging Pendulum Friction on the Roller-Coaster Car Friction with a Spring Package Dropped from a High-Speed Rocket Escaping the Earth or the Moon Stair-Climbing Power Power Needs of a Car