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Lecture 3: Newton's Laws
September 2, 2025
Reading Assignment
- Read: Chapter 4 (all of it)
- Study: Tip on p. 57; Got It 4.2; Ex 4.2; Tactics 4.1; Problem Solving Strategy 4.1; Ex 4.3; Fig 4.14; Ex 4.5
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.
- Analyze uniform circular motion by relating period, velocity, radius, and acceleration, including the directional properties of velocity and acceleration.
- Given several forces acting on a single object, use Newton's Second Law to determine the object's acceleration; or given the motion, determine an unknown force.
- Given a physical situation, apply Newton's Second and Third Laws following these steps: a) sketch the situation, b) identify the forces, c) draw free-body (force) diagrams for each relevant object in the system (separate from original sketch), d) write Newton's Second Law for \(x\)-, \(y\)- and \(z\)- components for each mass (each component is a separate equation), and e) solve for unknowns.
- Solve problems involving weight forces, normal forces, tensions, spring forces, friction forces, and drag forces.
Homework
- Wednesday's Assigned Problems:
- Monday's Hand-In Problems:
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
Joe Hisaishi, A Symphonic Celebration, Music from the Studieo Ghibli firlms of Hayao Miyazaki