## Unit 3: Interactions / Forces

Text resources:

Unit packet here

Recommended Videos

Learning Targets

Additional Problem sets:

Learning Targets

Slides

- OpenStax: College Physics Chapter 4
- Walker: Physics Chapter 5 (sections 1-4)

Unit packet here

Recommended Videos

- Example: Solving for acceleration on an inclined plane without friction here
- Example: Solving for acceleration on an inclined plane with friction here
- Example: Atwood machine with two masses hanging YouTube
- Example: Atwood machine table with one mass hanging YouTube
- Example: Atwood machine on inclined plane YouTube
- Example: Statics - mass supported by more than one wire here and here

Learning Targets

- Be able to draw free body diagrams
- Be able to identify action-reaction pairs of forces
- Be able to identify and calculate the force of gravity and the normal force
- Be able to calculate force from mass and acceleration
- Be able to separate forces into components
- Be able to explain and calculate the force of static and kinetic friction
- Be able to describe and calculate properties of objects in equilibrium (both static and dynamic)
- Be able to describe and calculate properties of objects experiencing a none zero net force
- Be able to calculate properties of Atwood machines and ½ Atwood machines

Additional Problem sets:

- MasteringPhysics online (book #17, 18, 59, 60, 80)
- Newtons Second law here
- Free Body Diagrams here
- Forces at angles here
- Combining forces here
- Frictional forces here
- MasterinPhysics online (book # 56, 62, 74, 96, 100, 103, 108, 125)
- Statics here
- Attwood machines here
- Answers to problem sets here
- Answers to practice test here

Learning Targets

- Be able to draw free body diagrams
- Be able to identify action-reaction pairs of forces
- Be able to identify and calculate the force of gravity and the normal force
- Be able to calculate force from mass and acceleration
- Be able to separate forces into components
- Be able to explain and calculate the force of static and kinetic friction
- Be able to describe and calculate properties of objects in equilibrium (both static and dynamic)
- Be able to describe and calculate properties of objects experiencing a none zero net force
- Be able to calculate properties of Atwood machines and ½ Atwood machines

Slides

**Physics**- Walker 2014

Chapters and Sections:

Chapter 5: 1,2,3,4

Good problems to master:

Ch5: 43,47,51,54,57,62,65,68,70,75,80,83,84,86,90,93,99,102,104,106,115,118