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For more information, please see full course syllabus of AP Physics B
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Lecture Comments (5)

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Post by Jamal Tischler on February 9, 2015

Try this problem: At what angle we must shoot an object that its range is maximum ?

1 answer

Last reply by: Jamal Tischler
Mon Feb 9, 2015 12:28 PM

Post by Travis James on September 10, 2012

can you solve a problem when only given magnitude and two theta's ie. an obj. that weighs 70N held by a line that meets its point and 25degrees and 37degrees (so how can i calculate lenght of each radiant)

1 answer

Last reply by: Jamal Tischler
Mon Feb 9, 2015 12:25 PM

Post by Irene Holly on February 17, 2012

How do i ask question's? Like where did t=4s come from in the original problem?? Irene

Motion in Two Dimensions, Part 1

  • In two dimensions, displacement, velocity, and acceleration are vectors with x- and y-components.
  • In projectile motion, it is important to separate the horizontal motion from the vertical motion. Acceleration due to gravity is always vertically down and it has zero horizontal component. But displacement and velocity have both horizontal and vertical components.

Motion in Two Dimensions, Part 1

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

  • Intro 0:00
    • Position, Displacement, Velocity, Acceleration
    • Position of an Object in X-Y Plane
    • Displacement of an Object
    • Average Velocity
    • Instantaneous Velocity at Time T
    • Acceleration of Object
  • Projectile Motion 9:57
    • Object Shooting at Angle
    • Object Falling Vertically
    • Velocity of an Object
    • Displacement of an Object
    • Initial Velocity Remains Constant
    • Deriving Equation of a Parabola
  • Example: Shooting a Soccer Ball 25:25
    • Time Ball Spent in Air (Ignoring Air Resistance)
    • Range of Projectile
    • Maximum Height Reached by the Projectile
  • Example: Shooting an Object Horizontally 40:38
    • Time Taken for Shooting
    • Range
    • Velocity Hitting Ground
  • Extra Example 1: Projectile Shot with an Angle
  • Extra Example 2: What Angle