1 / 19

PHYS16 – Lecture 5

Lingenfelter Corvette. PHYS16 – Lecture 5. Free Fall and Race Cars: Constant Acceleration September 17, 2010. Too Good to be True???. http://Z06-corvette.com. Agenda. Administration Key Concepts – Physics 1D motion Constant Acceleration. Administration. Homework Assignments

dominy
Télécharger la présentation

PHYS16 – Lecture 5

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. Lingenfelter Corvette PHYS16 – Lecture 5 Free Fall and Race Cars: Constant Acceleration September 17, 2010 Too Good to be True??? http://Z06-corvette.com

  2. Agenda • Administration • Key Concepts – Physics 1D motion • Constant Acceleration

  3. Administration • Homework Assignments • Due Sunday, Written homework, Math Exam, & Ch. 3 Online homework

  4. Key Concepts: Physics 1D Motion • Displacement, Velocity, & Acceleration • Know the definitions of these terms • Know how they are related • Motion with Constant Acceleration • Solve for constant accel. get Kinematic Eqs. • Use the Kinematic Eqs. to solve problems • Free Fall • Race Car

  5. What is constant acceleration? • Examples of a ≠ constant? • Bee flying • Dust Particle in the wind • Acceleration = constant (0 or some #) • Velocity can be approximated as linear • How many of these things have a=const? • Trains • People • Planes • Cheetahs • Automobiles

  6. Derive Kinematic Equations for Constant Acceleration

  7. Last time X V A

  8. Derive Kinematic Equations

  9. Free Fall

  10. Free Fall – Using the Equations • Constant acceleration is due to gravity • Drop a ball from 3 m, how long does it take to hit the ground?

  11. Free Fall – What does it imply? • Demo: Falling Balls • Demo: Feather vs. Penny http://panda.unm.edu/demos

  12. Free Fall – What does it imply? • Acceleration of any size or mass object should be the same • Penny should fall at the same rate as feather • This isn’t true due to air resistance • In vacuum it is true!

  13. Race Cars

  14. Lingenfelter Corvette • Can it really do 0 to 60 mph in 1.97 s? • Let’s calculate some #’s to see if it is reasonable http://Z06-corvette.com

  15. Lingenfelter – 0 to 60 mph in 1.97 s

  16. Stock Car – 0 to 333. 2 mph in ¼ mile

  17. C6 Corvette – 0 to 60 mph in 4.2 s

  18. Is it true? • Stock Car – 220,000 miles/hr2 • Lingenfelter Corvette – 110,000 miles/hr2 • C6 Corvette – 51,000 miles/hr2 • Yes, let’s look at some data from youtube…

  19. Summary • Most physical objects experience constant acceleration • Use Kinematic equations of Motion to solve for problems with constant acceleration • Examples: Free Fall and Race Car

More Related