8.1 - Work

Breonna, Destiney, Shomari, Sapphira, Sierra, Alexia BOARD 1 Bell Ringer Sit in your assigned seat Appoint a group leader Denice Kanisha Torien Ms. King desk Aaron Jordan Isaiah Steven Chiarrah Justis Ronica Eddie Christian B Cabinets Terronda Davon B Kenneth Nyri Mirisa Tayia Mikesha Rhyannon Kiana Donovan Darius Diamond Elijah BLACK DESKS ONLY: Breonna, Destiney, Shomari, Sapphira, Sierra, Alexia Kendjy Jamya Damion Matthew

2 Bell Ringer Sit in your assigned seat Appoint a group leader BOARD 2 Bell Ringer Sit in your assigned seat Appoint a group leader Carmani Jakeria T. Malik Ms. King desk Deondre Destini Cedric Akiara Asia Diane Kendall Perryon Christine Cabinets Semaj Courtney Desean Isaiah Lionel Donquavis Jakeria W. Alexandrea Ty’riona Christie Annamaria Tareek BLACK DESKS ONLY: Tyquan

4 Bell Ringer Sit in your assigned seat Appoint a group leader BOARD 4 Bell Ringer Sit in your assigned seat Appoint a group leader Jalen Tashauna Jordan Ms. King desk Dre Taliyah Gammoni Jayla Brooklen Deondra Cabinets Joslyn Samiyah Kenosha Brittany Garry Cathie Stephanie Brandie Ivory Lakahla Sanquan Calvin Devin Tylauna Raheem BLACK DESKS ONLY: Terrell Amari

6 Bell Ringer Sit in your assigned seat Appoint a group leader BOARD 6 Bell Ringer Sit in your assigned seat Appoint a group leader Khai Darius Justen Ms. King desk Tyrah Kyceem Jaquan Chaiashia Billy Emely L. Cabinets Joshua Nicholas Emely S Derreonte Jo’von Coranel Jamileth Jasmine H. Stephen Kenya Xavier Sarah Sammiyah Dyamond Jasmine D. Zachary BLACK DESKS ONLY: Christian P. Crystal

Michelle, Cianne, Keniya, Raven S, Jakquese, BOARD 7 Bell Ringer Sit in your assigned seat Appoint a group leader Taylor Alexis Erika Ms. King desk Shantrell Khateeb Faith Shakira Regina Briana E Cabinets Diane Raven M Lakieoria John M Gabriella Destiny Jonothan Jamuari Ahdrevious Nelson Dawud Carrie Tyler Zakera Raquan Russel Emogie BLACK DESKS ONLY: Michelle, Cianne, Keniya, Raven S, Jakquese, Caitlin Jaimie Tiffany Cayla S

Jeannie, Courtney, Antonio, Hayley BOARD 8 Bell Ringer Sit in your assigned seat Appoint a group leader Lance Shavonna Johneda Ms. King desk Essence Chris F Cameron O Ralph R Kyree Diante Colay Dacia Alvin Cabinets Kiyem Anbriana Nesha Nick R. Cameron P Tazion Richard Noemi Ahmari Jakyyah Camille Candie computers: Jeannie, Courtney, Antonio, Hayley Sa’koyia Johnny

DO NOW Calculate the potential energy of a bird sitting on a tree limb. The mass of the bird is 0.1 kg and it is 5 m off the ground. What is the kinetic energy of a 2000 kg car that is traveling at 10 m/s? Are you really doing work when you do your science homework?

8.1 Work In science, work is a form of energy you either use or get when a force is applied over a distance. You do 1 joule of work if you push with a force of 1 newton for a distance of 1 meter.

8.1 Work When thinking about work, remember that work is done by forces that cause movement. If nothing moves (distance is zero), then no work is done.

8.1 Work Force (N) W = F x d Work (joules) Distance (m)

8.1 Work and energy Doing work always means transferring energy. The energy may be transferred to the object you apply the force to, or it may go somewhere else.

8.1 Work and energy You can do work to increase an object’s potential energy. Then the potential energy can be converted to kinetic energy.

8.1 Work A raised object’s potential energy equals the amount of work it can do as it moves down. The amount of kinetic energy an object has equals the amount of work the object can do by exerting force as it stops.

8.1 Work If force is equivalent to the weight of the object in newtons, and height (h) is equivalent to distance (d), Then multiplying the weight by height gives you the amount of work the object can accomplish as it moves down (as well as its potential energy).

8.1 Work Force A does no work because it does not cause the block to move. Force B is applied at an angle to the direction of motion, so only part of force B does work. The most effective force to move the block is force C.

Solving Problems How much work is done by a person who pulls a cart with a force of 50 newtons if the cart moves 20 meters in the direction of the force?

Looking for: Given: Relationships: Solution Solving Problems …work done by person Given: …force = 50 N (forward); …distance = 20 m Relationships: Work = force x distance Solution 50 N × 20 m = 1,000 joules.

Copy the following Graphic Organizer: If you do not have a graphic organizer sheet, copy this word for word into your journal

Expectations for page 192 Write the question and answer: pg.192 #1-9 All of the answers are in pages 188 - 191

Vocab Flip Chart 7.1 Vocab Flip Chart 8.1 Energy Work Mechanical Energy Chemical Energy Nuclear Energy Radiant Energy Potential Energy Kinetic Energy Elastic Potential Gravitation Potential Energy Work Power Watt Horsepower