Conservation laws
Terms, formulas, and an interactive lab: a collision of two carts with sliders for masses and velocities and graphs of the momenta, and a cart pulled by a force with sliders for force, distance and time and the graph of work, and bar charts of kinetic and potential energy with graphs E(v) and E(h), and a thrown body with graphs of E_k(t), E_p(t) and E(t) that show the law of conservation of mechanical energy, and a lever with sliders for forces and arms and an inclined plane with graphs of work and the efficiency.
Momentum. Conservation of momentum
Momentum of a body, a closed system, the law of conservation of momentum for motion along a straight line, an inelastic collision, jet propulsion.
Mechanical work and power
Mechanical work when the force acts along the displacement, the joule, power, the watt, the link between power, force and speed.
Kinetic and potential energy
Energy, the kinetic energy of a moving body, the potential energy of a raised body and of a deformed spring.
Law of conservation of mechanical energy
Total mechanical energy, the conversion of kinetic energy into potential energy and back, the law of conservation of mechanical energy when there is no friction.
Simple machines. Efficiency
The lever, the arm and the moment of a force, pulleys, the inclined plane, the "golden rule" of mechanics, useful and spent work, efficiency.