We really only had two days this week to go over new material since Wed – Fri was testing stuff.
PhySP18SS6.4.1 Clever Barrista
PhySP18SS6.4.3 My favorite painting of Dali’s. This is a MASSIVE painting at the museum. It takes up the whole of a very tall wall. I stood and stared at it for an hour until Jamie pulled me away. She said something about helping her with the boys.
PhySP18SS6.4.5 With pulley systems we must melt the x axis around the pulley. Thanks Salvador!
PhySP18SS6.4.6 5 rules of pulleyland.
PhySP18SS6.4.7 You most simple, basic pulley problem.
PhySP18SS6.4.8 Simple Pulleys are just another way to change the direction of the effort force you must out in to lift an object or let an object fall gently to the earth. You know how inclined planes “dilute” gravity? Well, so do pulleys. They dilute gravity. Notice how this one cuts gravity by 75%.
PhySP18SS6.4.9 Here is a twist on the simple pulley problem. Now it is just the inertia (not the weight) of one of the boxes that is diluting gravity. In this case it is also the friction, but sometimes the surface is frictionless and it is JUST the inertial mass that is diluting gravity. Physics teachers love this problem because it gets at one of their favorite subjects — separating out gravitational mass and inertial mass).
PhySP18SS6.4.10 Ah . . . full blown Inclined Plane/Pulley Problem. We use the villatoro Short Cut for this kind of problem.
PhySP18SS6.4.11 Joel Villatoro was always trying to find shortcuts to working Physics problem.s. This one stuck.
PhySP18SS6.4.12 . . .
PhySP18SS6.4.13 . . .
PhySP18SS6.4.14 . . .
PhySP18SS6.4.15 Fastest way to solve it is with the VSC.
PhySP18SS6.4.16 THis is about as hard as the Inclined Plane-Pulley problems will get this year.