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Physics Core/AP 1 and 2

Chapter 3: 5-8 Assignment

Course Materials are always under revision! Weblecture content may change anytime prior to two weeks before scheduled chat session for content.

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Physics Chapter 3: 5-8: Projectiles Motion


Reading Preparation

Text Reading: Giancoli, Physics - Principles with Applications, Chapter 3: Sections 5-8

Study Points

Key Equations

The Range Equation for Projectiles (where y = y0) R    =   v 0 2   sin   2 θ 0 g

Note that when θ0 = 45°, sin 2θ = sin 90° = 1, and has the maximum value possible for any θ, R    =   v 0 2   g

Projectile Motion is Parabolic y    =   v y0 v x0   x     ( g 2 v x0 2 ) x 2

Web Lecture

Read the following weblecture before chat: Unit Vector notation

Study Activity

The website below will either download a Java applet to your computer or run the applet in place, depending on how your browser is configured. You will need Java installed to run the applet locally on your computer.

The "projectile motion" simulation allows you experimnt with projectiles launched at different speeds and angles. Use the slide bar to adjust the initial speed. Grab the mouth of the cannon to tilt it to different angles. Use the red cannon button to fire the cannon and the eraser button to reset. See if you can find more than one combination to hit the bull's eye (three stars).

  • With the vectors panel, turn the different components on and off to identify the velocity and acceleration vectors involved, and watch how they change as the projectile ascends and descends. Are velocity and acceleration always in the same direction? Are acceleration and force always in the same direction?
  • We'll come back to this scenario to see how drag force affects projectile motion in the next chapter.

Physics simulation Java Applets are the product of the PHET Interactive Simulations project at the University of Colorado, Boulder.

Chat Preparation Activities

Chapter Quiz

Lab Work

If you want lab credit for this course, you must complete at least 12 labs (honors course) or 18 labs (AP students). One or more lab exercises are posted for each chapter as part of the homework assignment. We will be reviewing lab work at regular intervals, so do not get behind!