Physics 101: Key High School & College Physics Lessons

Distinguish vectors from scalars by magnitude plus direction versus magnitude alone, with examples like velocity, displacement, force, and momentum. Explore how mass is a scalar, while acceleration is a vector.

Explore two-dimensional vector addition with vectors at a 90 degree angle, applying head-to-tail placement and the Pythagoras theorem to compute the resultant magnitude, with a preview of vector components.

Define and categorize forces, including gravity, normal force, friction, drag, magnetism, and electrostatic forces, as contact or non contact. Demonstrate balanced versus unbalanced forces and introduce the resultant forces.

Explore Newton's second law, f = m a, and learn how force, mass, and acceleration relate through units like newtons, kilograms, and meters per second squared.

Learn Newton's third law: every action has an equal and opposite reaction, illustrated by pushing a wall, sitting on a chair, and rocket propulsion in space.

Explore friction, a resistive force that opposes motion, and distinguish kinetic friction with F_k = mu_k N from static friction with F ≤ mu_s N.

Practice applying kinetic and static friction concepts with formulas F_k = μ_k N and F_s ≤ μ_s N, using normal force mg to solve constant-velocity and threshold-to-motion problems.

Define energy as the ability to do work and show how chemical, nuclear, sound, elastic and gravitational potential, and kinetic energy transform, bound by the conservation of energy.

Explore the first law of thermodynamics, where internal energy in a closed system changes with heat transfer and work. Learn the sign conventions with practical examples.

Learn specific heat capacity—the energy to raise one kilogram by one degree Celsius or kelvin—with iron and copper illustrating differing heat responses and the units joules per kilogram kelvin.

Learn Coulomb's law: two charges attract or repel at a distance, with the force F = K q1 q2 / r^2, where K equals 9×10^9.

Compute Coulomb's law forces between multiple charges at 90 degrees, assemble a free-body diagram, and find the net force and angle using vector addition, Pythagoras, and basic trigonometry.

Explore the differences between series and parallel resistor connections, where current and voltage behave differently, and learn to calculate equivalent resistance for each configuration.

Explore magnetism and magnets, including natural magnetite and ferromagnetic materials, plus polarity, domains, and magnetic fields. Learn how magnetic flux measures field strength and how electricity creates magnets through electromagnetism.

Explore electromagnetism by linking electricity and magnets, learn how current-carrying wires generate magnetic fields, apply the right hand rule, and see how solenoids with iron cores boost magnet strength.

Explore pendulums as simple harmonic motion and learn how length and gravity determine the period using the formula T = 2π sqrt(L/g), with g = 9.81 m/s² on Earth.

Learn how convex and concave lenses form images by tracing rays, identifying focal point and center of curvature, and predicting real inverted or virtual upright outcomes.

The lecture describes the nucleus as protons and neutrons, the nucleons, with Z and A, and explains how the strong nuclear force holds them together, introducing isotopes.

Explore radioactivity and the three decay types—alpha, beta, and gamma—showing how nuclei become more stable as protons and neutrons change, emit particles, and produce photons.

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