how small is small? image:

How Small is Small?

Image: http://en.marveldatabase.com/Ant-Man

Monday & Tuesday

Sept. 22 & 23

Vocabulary Sheets DueSept. 24

Energy Super Heroes

Presentations start on Sept. 24

Image: http://www.coverbrowser.com/covers/action-comics

40% Accuracy of your presented physics solution

20% Submitted project paperwork: turn in your presentation materials (PowerPoint file in most cases); all of the problems, solved completely and neatly; and your Energy vocabulary sheet

20% Strength of your presentation (both oral and visual style will be considered)

20% Quality of your supporting information such as background story and physics explanations

How Far?

0

The Flash’s position

Increasing positive position

Increasing negative position

Position, velocity, and acceleration require reference points.

Distance

How do you define distance?Does it require a reference point?

0

Distance

How do you define distance?Does it require a reference point?

0

No. Distance is how far 2 points are separated.It’s an example of a scalar quantity.

Velocity and acceleration are vector quantities.

How Fast?

The Flash runs 1000 m in 3 sWhat’s his average velocity?

0 1000 m

Classwork

• Pages 58-60 (in Chapter 3)– Applying Concepts

1-4– Problems 1-3

Image: http://www.coverbrowser.com/covers/the-flash

http://www.youtube.com/watch?v=oa9t_m-38Z4

http://www.youtube.com/watch?v=HNFftA1Pry0

How fast must Superman fly to circle the globe as fast as shown here?

DisplacementGiven velocity and timeRecall:

Rearranging to solve for change in position:

Position vs. Time Graphs

Position vs. Time GraphsWhat do these graphs represent?

Position vs. Time GraphsWhat do these graphs represent?

Classwork

• Pages 58-60 (in Chapter 3)– Applying Concepts

6-9– Problems 4, 6, 9

Image: http://www.coverbrowser.com/covers/the-flash

Wednesday & Thursday

Sept. 24 & 25

Present our “Energy Superhero” projects

Friday

Sept. 26

Kinematics Vocabulary

Due week of November 3

This week: •average velocity, •final velocity, •frames of reference, •initial velocity, •instantaneous velocity, •kinematics, •mechanics, •scalar, •vector

Negative Velocity?Refer to Example Problem on p. 52.

Velocity vs. Time GraphChanging it up: put velocity on the y-axis.

velocity

time

What does the corresponding position vs. time graph look like?

Velocity vs. Time Graph

Check out the area under the graph line.

velocity

time

What’s the area of a triangle?What’s the meaning of this area?

Classwork

• Pages 58-61(in Chapter 3)

– Applying Concepts 10 & 11

– Problems 21, 23, 25

Image: http://www.coverbrowser.com/covers/the-flash