WarmUp During the previous year Zachs weather station

Warm-Up: During the previous year, Zach’s weather station measured 0. 8 yards of rain. Express this amount in cm. (Extra Credit) 2. If a swimmer swims 85. 4 yards in five minutes, how many meters will she swim in 70. 0 seconds? (Extra Credit) 3. What is the difference between speed and velocity? 1.

Unit 1 Exam �When: �Friday, February 28 th �What: �Dimensional Analysis – Metric and Factor-Label �Scientific Method �Significant Figures �Kinematics (speed, velocity, acceleration, distance, displacement, position,

Yellow Vocabulary Sheets �Due Monday, February 24 th (next class period). �You will get them back Monday so you can study from them!

Extra Credit �There are two assignments, each worth 20 points. �Both assignments are due on Exam Day.

Notebooks �You will be leaving your notebooks with me after your exam. �I will pick, at random, 5 warm up questions. If you did the 5 I choose, you get full credit. If you missed any of the 5 I choose, you loose points. �This will be a 15 pt assignment. �If you did not complete warm-ups – find them on my Website in the PPTs.

Speed vs Velocity WS �You will have 15 minutes to finish the Speed vs Velocity WS from last week. �Again, don’t write on the white sheet with the problems. �EACH person must turn in their own sheet of notebook paper with their answers on it.

Graphing WS �Describe the motion presented in the two graphs. �READ THE INSTRUCTIONS. �Each person needs their own sheet of paper to answer the questions. �You will not receive credit if instructions are not followed.

Groups for Graphing WS – 3 A Christensen, Riley; Reich, Cody; Horne, Chelsea Jenkins, Janel; Cooke, Emilie; Rodriguez, Daniela Zerapio, Elizabeth; Turpen, Jacob; Hussey, Julienne Butterfield, Hyrum; Ortez Pina, Arturo; Gray, Randall Feierfeil, Kyle; Fuller, Brooke; Hall, Emily; Hernandez, Carlos Terry, Taylor; Cogle, Katlyn; Knudsen, Leora; Meredith, Brandon Jordan, Arica; Prunetti - York, Brittany; Vogt, Jordan Walliser, Katie; Shiley, Cameron; Cedillo, Karissa Guerrero Pena, Juan; Beck, Ashley; Lasher, Gage Price, Mckenzie; Jones, Tayler; Juarez, Bianca; Hogarth, Darren Ferency-Giffin, Gabriel; Salazar, David; Adamson, Madison; Mejia, Kayla

Groups for Graphing WS – 4 A Lopez-Hernandez, Pablo; Taylor, Camren; Hestekin, Samantha Kessler, Natalie; Sepulveda. Najera, Oscar; Kellogg, Zachary Serrano, Roxana; Hernandez, Jose; Perez, Juan Harrison, Walker; Baker, Jadyn; Smith, Robert Hancock, CJ; Carson, Robert; Guerrero, Diana Christensen, Sadie; Stombaugh, Jenna; Allen, Courtney; Breshears, Megan Ross, Erik; Galvan, Alondra; Rodriguez, Lesly Ables, Autumn; Halsted, Forest; Reding, Kelsey Solis, Summer; Cassidy, Tre. Sen; Castillo, Oscar

Acceleration

Acceleration �Rate of change in the speed and/or direction of an object. �Units: Speed/time �m/s 2 �mi/hr 2 �Notice how the time is squared in the denominator.

Calculating Acceleration �Acceleration is the rate of change in speed and/or direction. �Mathematically we represent this as: What do you notice about this equation? Write down your thoughts in your notebook.

Calculating Acceleration Final velocity – Initial velocity Remember, acceleration could be same speed, but change in direction! Divided by time This is how we get squared units in the denominator.

Practice Calculations: 1. A car goes from 0 to 100 km/hr in 10 seconds. What is its acceleration in km/hr? § § (Hint: Pay attention to units!) 3600 km/hr 2 = 4000 km/hr 2

Practice Calculations �A bus slams on its breaks and goes from 30. 0 km/hr to 15. 0 km/hr in 4. 00 seconds. What is its acceleration in km/hr? § - 13500 km/hr 2 �What does negative acceleration mean?

Practice Calculations �A car pulled out of a parking lot in 8 seconds going 35. 0 m/s. What was its acceleration? § 4. 375 m/s 2 = 4 m/s 2 �IF YOU START FROM REST – INITIAL VELOCITY = 0!

Practice �Take out a sheet of paper, write your name on it. �Find a partner. �You will EACH write the answers to the 6 questions on your notebook paper.