The Blog of Phyz

In this screencast, Paul extends the block of ice on a ramp to a bead sliding down a wire, to the motion of acrobats Ari, Bari, and their do...

In this screencast, Paul enlists Nellie Newton to illustrate the work-energy theorem to solve a motion problem. Hewitt-Drew-it! PHYSICS 30...

In this screencast, Paul derives kinetic energy from Newton's second law, and illustrates energy transfers for a block of sliding ice. ...

Exploratorium guru, Paul Doherty , sent this to the PTSOS Yahoo Group this morning. Enjoy! Here is some info I've scraped together o...

In this screencast, Paul illustrates work and potential energy via a barbell and other vertical lifts, and the energy states of a simple pen...

In this screencast, Paul explains two ways that Freddy the Frog slows a horizontally-moving skateboard by vertically falling on it. Hewitt...

The reference sheet that accompanies California's statewide end-of-course physics test has been changed. And I'm not happy about it....

In this screencast, Paul illustrates momentum conservation with a two-fish system. Hewitt-Drew-it! PHYSICS 26. Fish-Lunch Momentum Problem...

After watching the non-boiling pot of AP Physics B Redesign for a few years, I decided to look away until something actually happened. I ...

In this screencast, Paul shows how Newton's laws lead to the impulse-momentum relationship, which then leads to the conservation of mome...