PHYS 16 Lecture 5 Lingenfelter Corvette Too Good
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PHYS 16 – Lecture 5 Lingenfelter Corvette Too Good to be True? ? ? http: //Z 06 -corvette. com Free Fall and Race Cars: Constant Acceleration September 17, 2010
Agenda • Administration • Key Concepts – Physics 1 D motion • Constant Acceleration
Administration • Homework Assignments – Due Sunday, Written homework, Math Exam, & Ch. 3 Online homework
Key Concepts: Physics 1 D 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
What is constant acceleration? • Acceleration = constant (0 or some #) • Velocity can be approximated as linear • How many of these things have a=const? • Examples – Trains of a ≠ constant? – • People Bee flying – • Planes Dust Particle in the wind – Cheetahs – Automobiles
Derive Kinematic Equations for Constant Acceleration
Last time X V A
Derive Kinematic Equations
Free Fall
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?
Free Fall – What does it imply? http: //panda. unm. edu/demos • Demo: Falling Balls • Demo: Feather vs. Penny
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!
Race Cars
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: //Z 06 -corvette. com
Lingenfelter – 0 to 60 mph in 1. 97 s
Stock Car – 0 to 333. 2 mph in ¼ mile
C 6 Corvette – 0 to 60 mph in 4. 2 s
Is it true? • Stock Car – 220, 000 miles/hr 2 • Lingenfelter Corvette – 110, 000 miles/hr 2 • C 6 Corvette – 51, 000 miles/hr 2 • Yes, let’s look at some data from youtube…
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
Andrew lingenfelter
Too enough kahoot
Purdue phys 241
Too much money is chasing too few goods
Too anointed to be disappointed meaning
Too broad and too narrow examples
Too broad and too narrow examples
Too broad too narrow
Just right scale
Broad and specific topic examples
Too foreign for home
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