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Week 1 Day 3 Announcements Password for readings on webpage =>

“1point609”

* Books will arrive in Bookstore Monday or Tuesday

* Make sure you get your Mastering Physics account and iClicker set up for class – see calendar for help links

* iClickers are required in class starting Monday

* Any student who does not have their iClicker or Mastering Physics set up by Sept 10th will be dropped from the class

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Questions about the class1. How percentage of class points do you need to get a B?

A. 70

B. 75

C. 80

D. 85

E. 90

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Answer1. How percentage of class points do you need to get a B?

A. 70

B. 75

C. 80

D. 85

E. 90

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Questions about the class2. If you have missed more than one day of class due to illness,

where can you go to get an excused absence?

A. Instructor

B. Physics Department Chair

C. Dean of Student Services

D. Your Academic Advisor

E. Your major department chair

Slide 1-1

© 2010 Pearson Education, Inc.

Questions about the class2. If you have missed more than one day of class due to illness,

where can you go to get an excused absence?

A. Instructor

B. Physics Department Chair

C. Dean of Student Services

D. Your Academic Advisor

E. Your major department chair

Slide 1-1

© 2010 Pearson Education, Inc.

Course Format - Like class on Shakespeare

* Before class, learn material from reading - focus on key ideas, express them in your own words

* In class, build understanding of readings through activities and learn to apply ideas

* Homework, practice what you learn and deepen understanding

© 2010 Pearson Education, Inc.

Semester ThemeLearning to understand and how to analyze motion

Describing Motion

Forces

Momentum

Energy

Circular Motion

Rotational Motion

Oscillations and Waves

Thermodynamics

Fluids

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UnitsIs a penny equal to a dollar?

Start with $ 0.10 = 10 cents

Square both sides

$ .001 = 100 cents

Does a penny (100 cents) = dollar? (why not?)

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UnitsHow fast is 50 m/s in miles per hour?

Being able to convert between English units and Metric units is considered by the University to be a major course goal

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UnitsIs pi x 107 a good representation of the number of seconds in a year?

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Good Conversions to Know (or have handy)Rule of Thumb - Approximations

* 1 m/s ~ 2 mph

* 2 lbs ~ 1 kg

* 1.6 km = 1 mi < = > 1 km = 0.6 km

* 1 liter ~ 1 quart

More exact conversions

* 2.54 cm = 1 inch

* 1.609 km = 1 mi < = > 1 km = 0.621 mi

* 2.2 lbs = 1 kg

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© 2010 Pearson Education, Inc.

1. What is the difference between speed and velocity?

A. Speed is an average quantity while velocity is not.

B. Velocity contains information about the direction of motion while speed does not.

C. Speed is measured in mph, while velocity is measured in m/s.

D. The concept of speed applies only to objects that are neither speeding up nor slowing down, while velocity applies to every kind of motion.

E. Speed is used to measure how fast an object is moving in a straight line, while velocity is used for objects moving along curved paths.

Reading Quiz

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1. What is the difference between speed and velocity?

A. Speed is an average quantity while velocity is not.

B. Velocity contains information about the direction of motion while speed does not.

C. Speed is measured in mph, while velocity is measured in m/s.

D. The concept of speed applies only to objects that are neither speeding up nor slowing down, while velocity applies to every kind of motion.

E. Speed is used to measure how fast an object is moving in a straight line, while velocity is used for objects moving along curved paths.

Answer

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Reading Quiz2. The quantity 2.67 x 103 m/s has how many significant figures?

A. 1

B. 2

C. 3

D. 4

E. 5

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Answer2. The quantity 2.67 x 103 m/s has how many significant figures?

A. 1

B. 2

C. 3

D. 4

E. 5

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How to describe motion

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What information do you need to communicate to be able to tell someone how to reproduce a motion?

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How to describe motion

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What information do you need to communicate to be able to tell someone how to reproduce a motion?

• Frame of reference or reference frame

• Origin

• Where to start

• What direction to start moving

• What speed to start moving with

• Changes in direction or speed

• Where to stop

• Timing