Physics Fundamentalized

An example of the application of the conservation of momentum to a classic situation is described in detail. Newton's cradle is explained.

An example of the application of the conservation of momentum to a classic situation is described in detail. Newton's cradle is explained.

After a brief discussion of the notion of systems as it relates to momentum and its conservation, the velocity of a rocket in deep space as a function of fuel consumption is derived.

Momentum is introduces in the context of what Newton described as the quantity of motion. The second law is then cast into a momentum form, revealing the notion of impulse and the suggestion of momentum as a conserved quantity.

A customized form of the law of conservation of energy is derived and its features described in detail. The relationship between conservative forces and their associated potential energies is revealed and explained. Finally, power is defined and its practical applications are discussed.

The spring potential energy is derived.

The general definition of work is discussed as a practical matter, followed by a derivation of the gravitational potential energy.

In a special lecture of the series the kinetic energy is derived once again, but this time with respect for the variation of the mass with velocity resulting in the famous mass-energy relation. It goes on so long, a classroom door is used for extra space.

In this, the introductory lecture on energy, the kinetic energy is derived using calculus by computing the effect of a force acting in the direction of motion. Energy is also described as a universal symmetry and some practical maters of its application are discussed.

The first of the more informal problem solving sessions in preparation for the exam. A toaster is pulled by its cord and the angle of maximum acceleration is determined. A block slides on a slab which, in turn, rests on a frictionless surface.