Forces & Motion8th Grade Physical Science

Objectives

Forces Define Give examples Draw force diagrams

Big Ideas Unbalanced forces cause motion Newton’s laws help predict motion

Think-pair-share

What is a force?

List specific examples.

Types of Forces

"Types of Forces." Types of Forces. Web. 16 Apr. 2013. <http://www.physicsclassroom.com/Class/newtlaws/u2l2b.cfm>.

Types of Forces

Trefil, James S., Rita Ann. Calvo, and Kenneth Cutler. McDougal Littell Physical Science. Evanston,

IL: McDougal Littell, 2006. Print.

Force Diagram

Ristow, Kim. "Construction of Free-Body Diagrams." Construction of Free-Body Diagrams. Web. 16 Apr. 2013.

<http://www.wisc-online.com/objects/viewobject.aspx?id=tp1502>.

Force Diagram

Ristow, Kim. "Construction of Free-Body Diagrams." Construction of Free-Body Diagrams. Web. 16 Apr. 2013.

<http://www.wisc-online.com/objects/viewobject.aspx?id=tp1502>.

Think-pair-share

Forces and directions? Draw force diagram.

"Drawing Free-Body Diagrams." Drawing Free-Body Diagrams. Web. 16 Apr. 2013.

<http://www.physicsclassroom.com/Class/newtlaws/u2l2c.cfm>.

Answer

"Drawing Free-Body Diagrams." Drawing Free-Body Diagrams. Web. 16 Apr. 2013.

<http://www.physicsclassroom.com/Class/newtlaws/u2l2c.cfm>.

Balanced & Unbalanced Forces

Trefil, James S., Rita Ann. Calvo, and Kenneth Cutler. McDougal Littell Physical Science. Evanston,

IL: McDougal Littell, 2006. Print.

Think-pair-share

Does an object always move when a force acts on it?

Demonstrate…

Does It Move?

Fgrav Fgrav

Fnormal

Fgrav

Fnormal

Fapp

3-2-1 Review

Jot down: 3 types of forces

2 different force diagrams

1 question you have

Lab Activity

"Forces and Motion: Basics." PhET. Web. 17 Apr. 2013.

<http://phet.colorado.edu/en/simulation/forces-and-motion-basics>.

Lab Activity Discussion

Compare PhET results Big ideas?

BrainPOP – Newton’s Laws

"Newton's Laws of Motion." BrainPOP. Web. 17 Apr. 2013.

<http://www.brainpop.com/science/motionsforcesandtime/newtonslawsofmotion/>.

Apply Newton’s Laws

1st Law• With partner/group• Create basic demonstration

• Materials found around room• Create force diagram• Share in ~5 minutes

Apply Newton’s Laws

2nd Law

• Discuss with partner

• Rocket acceleration/fuel amount?

Trefil, James S., Rita Ann. Calvo, and Kenneth Cutler. McDougal Littell Physical Science. Evanston,

IL: McDougal Littell, 2006. Print.

Apply Newton’s Laws

3rd Law• Discuss with partner• Action/reaction forces?

• Interaction diagram…

Trefil, James S., Rita Ann. Calvo, and Kenneth Cutler. McDougal Littell Physical Science. Evanston,

IL: McDougal Littell, 2006. Print.

More 3rd Law…

Trefil, James S., Rita Ann. Calvo, and Kenneth Cutler. McDougal Littell Physical Science. Evanston,

IL: McDougal Littell, 2006. Print.

Newton’s Laws Describe Motion

Trefil, James S., Rita Ann. Calvo, and Kenneth Cutler. McDougal Littell Physical Science. Evanston,

IL: McDougal Littell, 2006. Print.

3-2-1 Review

Jot down: 3 – Newton’s 3 laws, in your own words

2 – examples of laws being applied (any)

1 – question you have about Newton’s Laws