Physics 101 - General Physics

Eugeniy E. Mikhailov

Fall 2022

General class information

Office hours

Syllabus html pdf

Tentative schedule and reading assignments

Problem sections

additional help

Final exam

Lecture notes

Lecture 37: Standing waves, overtones, sound, musical instrument and other fun activities.

Lecture 36: Pulses demo, energy transfer, pulse reflection, superposition principle, waves, S and P wave, standing waves

Lecture 35: Damped and forced/driven oscillations. Pulse propagation, wave equation.

Lecture 34: Oscillators, energy of oscillation, damped oscillators

Lecture 33: Oscillators, physical pendulums

Lecture 32: Oscillators, simple harmonic motion

Lecture 31: Remote study

Please watch complimentary video about resistive forces, i.e. drag and effects of viscosity. Even though in the lecture the motion of the spheres is discussed. You can think about pipes as “inverted” spheres, than you would see the connection to discussion of viscose flow in Ch14.7 of the text book. This is, by the way, your reading assignment.

By the way, I strongly recommend other lectures by Dr. Lewin.

Lecture 30: Buoyancy and Bernoulli’s equation, viscosity

Lecture 29: Buoyancy

Lecture 28: Fluids

Lecture 27: Fluids

Lecture 26: Ultimate strain or strength of materials

Building examples:

Building mistake: Hyatt Regency walkway collapse

Lecture 25: Static equilibrium (continued), why humans have bones

Lecture 24: Static equilibrium

Lecture 23: Tops, gyroscope, precession

Lecture 22: Torque, angular momentum, change of angular momentum connection to torque

Lecture 21: Moment of inertia, center of mass, parallel-axis theorem, torque

Lecture 20: Kinetic energy in rotational frame, moment of inertia, Cartesian and rotational frames similarities

Lecture 19: Polar coordinates, vector product, angular velocity and acceleration

Lecture 18: Linear momentum conservation in 3D, center of mass

Lecture 17: Linear momentum conservation in 1D

Lecture 16: Linear momentum and impulse, Linear momentum conservation, elastic and inelastic collisions.

Lecture 15: Kepler’s laws. Tidal forces

Lecture 14: Gravitational pull inside spherical body. Potential energy of gravitation, circular orbits, 3rd Kepler’s law, escape velocity

Lecture 13: Springs. Universal law of gravitation, mass of Earth, scale reading correction due to Earth rotation

Lecture 12: Energy conservation, power requirement, energy sources, demos. Calories and Joules.

Lecture 11: kinetic and potential energy, energy conservation, power

Lecture 10: Work of a force, work and kinetic energy connection, and potential energy of gravitational force

Lecture 09: Uniform circular motion, centripetal force

Lecture 08: Be careful with friction, pulleys, drag force

Lecture 07: Friction and normal forces, applications of Newton’s laws

Lecture 06: Common forces, applications of Newton’s laws

Lecture 05: Newton’s laws, mass, weight

Lecture 04: Projectile motion

Python demos

Projectile motion

Midterm 03

Midterm 02

Midterm 01

Extra credit problem

Problem specification

Imagine a rocket which adjusted its trust in such a way that it is hoovering still above the Earth surface, i.e. it is neither going up nor down nor sideways.

Clearly the energy is constantly used since the rocket burns the fuel to maintain above setting. But there is apparently no change of kinetic and potential energy.

Explain this strange paradox. The explanation should not contradict the things which we learned in the class.

Hint: think outside of the box.