Work and Energy Monday, January 11, 2016

Monday, 1/11  On your warm-up respond to the following:  What does the word work mean to you?  How do you know how much work someone is doing?  If you were going to write an equation for work what would it look like? Upcoming dates:  Wednesday, 1/13 – Work and energy quiz  Monday, 1/18 – Martin Luther King Holiday  Wednesday, 1/20 – Work, power, energy quiz  Wednesday, 1/20 – review due when the late bell rings.  Friday, 1/22 – Work, power, energy test  Friday, 1/22 – last day to turn in any missing assignments for work, power, energy unit.  See my website for additional important dates.

Vocabulary Review  Scalar – has magnitude and no direction  Vector – has a magnitude and a direction  Force – combination of the object’s mass and the acceleration of the object (F = ma)  Displacement – has a magnitude (distance measured in meters) and a direction.

Force Reading – 15 minutes  Part 1: While reading highlight the following words:  Force  Displacement  Work  Part 2: Summarize  Part 3: Answer the questions to check your understanding (click link to Physics classroom on my website)  Part 4: Calculate work

Cool Down  What role do you think an angle plays in the amount of work performed? Explain your answer.

What work is done when a refrigerator is pushed uniformly 12 m across the floor. The applied force is 480N. G: d = 12 m f = 480 N U: W E: W = f x d S: W = (480 N)(12m) S: W = 5760 Joules

Energy – Cornell Notes Read the Cornell Notes (CNs)  As you read the CNs highlight the words below:  Highlight the following words  Energy  Joules  Work

Let’s meet Benny!

PE example

KE example

Summary Your summary should answer the essential questions (2 – 3 sentences).

Practice Problems  Complete questions 1 to 20  When finished show me  Show me your completed work and I will enter your grade.  Check the key