David explains how to use a force vs. time graph to find the change in momentum and solves an example problem to find the final velocity of a spaceship. Created by David SantoPietro.
How to solve for the horizontal displacement when the projectile starts with a horizontal initial velocity. We also explain common mistakes people make when doing horizontally launched projectile problems. Created by David SantoPietro.
Instantaneous speed and velocity looks at really small displacements over really small periods of time. Created by David SantoPietro.
David defines what it means for something to be a simple harmonic oscillator and gives some intuition about why oscillators do what they do as well as where the speed, acceleration, and force will be largest and smallest. Created by David SantoPietro.
In this video David explains how the internal energy of a gas varies as a function of temperature. Created by David SantoPietro.
David shows how LOL diagrams allow us to visually represent what we mean by conservation of energy as well as what we mean by an energy system. Created by David SantoPietro.
In this video David explains how to find the magnitude of the electric field created by a point charge and solves a few examples problems to find the electric field from point charges. Created by David SantoPietro.
In this video David solves a few exmaple problems involving concave and convex mirrors using the mirror equation and magnification equation.
David explains how to use Newton's second law when dealing with multiple forces, forces in two dimensions, and diagonal forces. Created by David SantoPietro.
David explains some of the common misconceptions in dealing with Newton's Third Law. He also shows how to correctly and reliably identify Third Law force pairs. Created by David SantoPietro.
See how there's actually constructive (rather than just destructive) interference at some points on the screen. Created by David SantoPietro.
Some examples of using the thin lens equation with multiple lenses. Created by David SantoPietro.
In this video David solves an example problem to find the net electric field created by multiple charges at a point in between them. Created by David SantoPietro.
In this video David solves an example 2D electric field problem to find the net electric field at a point above two charges. Created by David SantoPietro.
Introduction to pressure-volume diagrams.
Introduction to pressure-volume diagrams, part 2.
David explains how a pendulum can be treated as a simple harmonic oscillator, and then explains what affects, as well as what does not affect, the period of a pendulum. Created by David SantoPietro.
David explains what affects the period of a mass on a spring (i.e. mass and spring constant). He also explains what does not affect the period of a mass on a spring (i.e. amplitude and gravitational acceleration). Created by David SantoPietro.
In this video, David explains what a photon is and how to determine the energy of a photon. Created by David SantoPietro.
In this video, David (and surfer Dan) explain how to determine the momentum of a photon.