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Lecture 2: Two- and Three-Dimensional Motion
August 28, 2025
Reading Assignment
- Read: 3-1, 3-2, 3-3, 3-6
- Study: Figs 3.1, 3.2, 3.4; Ex 3.1; Got It 3.2; Figs 3.7, 3.8, 3.9; Exs 3.2, 3.7, 3.8
Objectives
- (Continuing objective) Relate concepts of classical mechanics to “everyday” situations and discuss various applications of the concepts to practical problems in various fields of science, medicine and engineering.
- Describe vector quantities using: a) magnitude and direction, b) rectangular components, and c) unit vectors. Be able to convert from one description to another.
- Draw a sketch showing the addition of vectors. Calculate the vector sum quantitatively using the method of components.
- Given an object's path in space (in unit vector notation or a diagram) in two or three dimensions, determine its velocity and acceleration at various locations and times.
Homework
- Friday's Assigned Problems: A8(a), A91, A92; CH 3 #3, 4, 10, 13, 15, 21, 27
Notes: For CH 3 #13, delete the word "graphically"
Answers: CH 3 #21 the answer should be "in the i-hat direction." - Monday's Hand-In Problems related to today's lecture: A9, A10; CH 3 #16, 52, 60
Lecture Materials
Videos of example problems
To see the problem statement, click on the link below. To play the video example, click on the underlined words "Video Demonstration" near the top of the page with the problem statement.Pre-Class Entertainment