Here are the screenshots from last week. I will be working on the captions this weekend.
PhySP18SS4.3.1 Time stamp. It was shut down when I put this weeks screenshots together. DO YOUR JOB!! Government employees, like Air Traffic Controllers aren’t getting paid as of today (but are still expected to show up to work), but . . . Congress (whose fault it is), managed to put a provision in there where THEY still get paid. Run for office a few years and let’s boot these numbskulls out of there. Okay . . . back to Physics.
PhySP18SS4.3.2 remember, i rrroof goes with anything horizontal or east-west, j rrroof goes with anything vertical or north south.
PhySP18SS4.3.3 . . .
PhySP18SS4.3.4 . . .
PhySP18SS4.3.5 The equilibrant is the opposite of the resultant.
PhySP18SS4.3.6 When you construct the addition of vectors you need to use a ruler and a protractor. No freehand
PhySP18SS4.3.7 old shakey hands doesn’t work on head to tail method.
PhySP18SS4.3.8 . . .
PhySP18SS4.3.9 . . .
PhySP18SS4.3.10 Inertia is a property of matter!
PhySP18SS4.3.11 Basically, inertia is any objects resistance to a change in its velocity or lack of velocity. The more mass, the more the resistance.
PhySP18SS4.3.13 lil p!
PhySP18SS4.3.14 Newton’s 1st. Notice that the force must be EXTERNAL and UNBALANCED.
PhySP18SS4.3.15 Newton’s first in 5 words.
PhySP18SS4.3.16 so when a ball is being thrown across the room the only force acting on it (assuming air drag is negligible) is the force of gravity. What keeps in moving through the air is moving inertia (momentum).
PhySP18SS4.3.17 Galileo and Faraday were thought to be fools by some. Field forces?? Turns they were right.
PhySP18SS4.3.18 This is a preview of Free Body Diagrams (FBDs) You won’t be tested on it yet.
PhySP18SS4.3.19 I don’t trust you Pee Boy.
PhySP18SS4.3.20 Type I Projectile Motion. The object starts off horizontal. We catch a big break here because Voy = 0.
PhySP18SS4.3.21 THe path of a ball in Type I Proj Mot.
PhySP18SS4.3.22 Three different balls in Type I Proj Mot each moving at a different Vx.
PhySP18SS4.3.23 THe equations we use to Type I Proj Mot.
PhySP18SS4.3.25 4.8.5 hint. Key posted on the Facebook group.
PhySP18SS4.3.26 4.8.(front) A ball falling on Planet X. How big is it?
PhySP18SS4.3.27 We’ll discuss how I could do this in a few weeks.
PhySP18SS4.3.28 You can use a modified Newton’s IUNiversal Law of Gravity to determine the “g” on earth.
PhySP18SS4.3.29 The densities of rocky planets are pretty close. Usually around 5 g/cc
PhySP18SS4.3.30 A clever way to determine the radius of planet x once we know it’s “g”
PhySP18SS4.3.31 subbing and canceling
PhySP18SS4.3.32 A thought experiment. What is we drilled a hole through the earth and jumped in?
PhySP18SS4.3.33 Homework for this weekend. this gets you started.