Physics
Chapter 2: 1-5 Assignment
Homework
Physics Chapter 2: 1-5: Two Dimensional Kinematics
Homework
- Reading Preparation
- Key Equations
- WebLecture
- Study Activity
- Chat Preparation Activities
- Chapter Quiz
- Lab Work
Reading Preparation
Text Reading: Giancoli, Physics - Principles with Applications, Chapter 2: Sections 1-5
Study Points
- Section 1: We measure position from something, usually a point called our origin, against some background scale or frame of reference that tells us how far and in what direction. Distance alone from the origin will not give us location. We must also use directions (usually by measuring position against a coordinate system) to locate one point with respect to another. In mathematics and physics, quantities with only magnitude (size) are scalar, while quantities with both magnitude and direction are vectors. We perform mathematical operations such as addition and subtraction on scalars as we do in normal arithmetic. Vectors have their own rules for mathematical operations, since we have to take direction into account.
- Section 2: Displacement occurs over time when an object changes its location. If we consider only the total distance covered in a given period of time, we can calculate average speed. If we consider only the original and final position or displace, we can calculate average velocity.
- Section 3: A moving object has an instantaneous speed which cannot be directly observed or measured. To handle values at a given instant, we must use limits and calculus (technically beyond the scope of this course).
- Section 4: Any change in the velocity of an object is acceleration. Since velocity has two components, magnitude (speed) and direction, acceleration occurs if an object changes direction under constant speed (such as an object moving in a circle), as well as if the object speeds up or slows down.
- Section 5: The relationships of displacement, velocity, and acceleration can be summarized in four equations (remember that these assume constant velocity).
Key Equations
Web Lecture
Read the following weblecture before chat: The problems of distance and time
Study Activity
The DESMOS simulation allows you to play with settings for height and initial velocity for a falling object.
The Was Galileo Right? simulation at Concord Resources allows you to play with graphs and simulations for one-dimensional falling objects. Note that you must answer questions to continue, but I'm not collecting or grading these!
Chat Preparation Activities
- Essay question: The Moodle forum for the session will assign a specific study question for you to prepare for chat. You need to read this question and post your answer before chat starts for this session.
- Mastery Exercise: The Moodle Mastery exercise for the chapter will contain sections related to our chat topic. Try to complete these before the chat starts, so that you can ask questions.
Chapter Quiz
- The chapter quiz is not yet due.
Lab Work
If you want lab credit for this course, you must complete at least 18 labs; you may complete more if you are preparing for the AP exam.. 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!
- Lab Instructions: Velocities of Falling Bodies 1
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