1 / 11

Exam 2 Review

Exam 2 Review. Jerika McKeon You will need your CID for the exam- Memorize it!!!!!. Announcements. Other Reviews: Tomorrow @ 5:30-7pm Friday @1-3pm ( weekly ) 108 MARB Check to see if you are missing any FBD scores. If you are, check the boxes to see if you put the wrong CID.

feldt
Download Presentation

Exam 2 Review

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Exam 2 Review Jerika McKeon You will need your CID for the exam- Memorize it!!!!!

  2. Announcements • Other Reviews: • Tomorrow @ 5:30-7pm • Friday @1-3pm (weekly) 108 MARB • Check to see if you are missing any FBD scores. • If you are, check the boxes to see if you put the wrong CID. • Turn it back into the 105 Appeals box. • I’m behind on extra credit, but I will grade it. Don’t worry about sending me an other copy. I will email you once your extra credit is in Max.

  3. Energy • Kinetic Energy • Potential Energy • Gravitational PE • Spring PE • Work • W=change in energy • W=F//d • Work lost by friction • Power (NOT IN SYLLABUS) • P=ΔE/Δt • Conservation of Energy • Work-Energy Theorem • Collisions • Elastic • Inelastic • Perfectly Inelastic

  4. Energy Cont. Kinetic Energy Potential Energy Linear KE KE=1/2*m*v^2 Rotational KE 1/2*I*ω^2 Depends on moment of Inertia (we’ll talk about that in a minute) Gravitational PE PE=mgy PE=-GMm/r PE=0 at r=∞ Escape velocity equations Spring PE F=-kx PE=1/2*k*x^2 Always positive (for both compressed & stretched springs)

  5. Linear Momentum • p=mv • Conservation of momentum- When is this true? • Impulse=Ft • FΔt=Δp

  6. Collisions Elastic Inelastic Energy is conserved Conservation of momentum and conservation of energy Can use the velocity reversal equation Usually you will use 2 equations and make some substitutions to get your answer Inelastic Energy is not conserved Use conservation of momentum Perfectly Inelastic Energy is not conserved; Max energy is lost Objects stick together Use conservation of momentum

  7. Conservation of Energy • Ei+Wnet=Ef • Wnet • Energy lost from friction • Energy gained through other forces • Photogate problem!

  8. Angular Stuff • Angular Kinematics • Δθ=θf – θi • ω=Δθ/Δt • α=Δω/Δt • Other kinematics equations • Conversions- all θ must be in radians • s=rθ • v=rω • a=rα

  9. Moment of Inertia • Analogous to mass • Depends on how the mass of an object is distributed • I=mr^2 for point mass • I=other stuff for other shapes

  10. Angular Momentum & KE • Angular momentum • Li=Lf • L=Iω • L=rp (hidden angular momentum) • KE=1/2*I*ω^2

  11. Torque • Pivot Points • T=rF • Tnet=Iα • Sum of Torques just like sum of Forces • Counterclockwise = positive • Clockwise = negative • Equilibrium = no angular or linear acceleration • Tnet=0 • Fnet=0

More Related