Simple Machines January 13, 2014

DO NOW:Date: January 13, 2014 6.8E investigate how pulleys can be used to change the amount of force needed to move an object.

1. Copy down this week’s TEKS

Q?: Did you do any work (scientifically speaking) this weekend? Explain.

Ms. SmithMrs. MaloneMs. Cedillo

Homework January 13, 2014

Write HW in agenda: “Pulley” Reading and Questions – due Friday

Write answers to questions on a separate sheet of paper and staple to reading.

Ms. SmithMrs. MaloneMs. Cedillo

Simple Machines January 13, 2014

Finish Science Court:

Ms. SmithMrs. MaloneMs. Cedillo

Science Court: Work and Simple Machines

Pulley Observation Sheet January 13, 2014

Ms. SmithMrs. MaloneMs. Cedillo

Tape “Pulley Observation Sheet” to page 69.Observe the picture of a pulley below.

Answer the questions on your “Pulley Observation Sheet”.

Pulleys January 13, 2014

Ms. Cedillo

BrainPop: PulleyBe listening for common examples of pulleys!

Pulley Exit Ticket January 13, 2014

Ms. Cedillo

What is a pulley?How does it help us do work?

Pulleys January 14, 2014

DO NOW:Date: January 14, 2014

6.8E investigate how pulleys can be used to change the amount of force needed to move an object.

Q?: In your own words, define the words effort and load.

Ms. SmithMrs. MaloneMs. Cedillo

Pulleys January 14, 2014

DO NOW REVIEW:

Q?: What is effort? What is load?

Effort = the force exerted on a load

Load = the weighted object being moved

These definitions are in your homework

Ms. SmithMrs. MaloneMs. Cedillo

Pulley Reading Jigsaw January 14, 2014

Today’s Assignment

Ms. SmithMrs. MaloneMs. Cedillo

Each group will be assigned either Reading #1 (Pulley Theory-Egyptians) or Reading #2 (Pulley Personality-Rube Goldberg)

As a group, you will read the reading and create a poster answering the following questions:1. What was the main idea of your reading?2. How did the person/people in your reading use pulleys?3. Would we use the pulley in the same way today? Why or why

not?

Group 1 (Pulley Theory-Egyptians): Destiny, Jennifer, Tre, ElisandroGroup 2 (Pulley Personality-Rube Goldberg): Elijah C, Ian, David, Elijah G, Isaiah

Pulley Poster January 14, 2014

Poster Grading Rubric

Ms. SmithMrs. MaloneMs. Cedillo

Main Idea clearly stated = 25 pointsHow person/people used pulley clearly stated = 25 pointsDescription of how/if we would use pulley today = 25 pointsColor, neatness, organization, illustrations, overall high quality poster = 25 points

DUE AT END OF CLASS!

If your group finishes early, you may work on your homework.

Pulleys January 15, 2014

Ms. SmithMrs. MaloneMs. Cedillo

DO NOW:Date: January 15, 2014 6.8E investigate how pulleys can be used to change the amount of force needed to move an object.

Q: How do you think flagpoles work?

Write in Agenda: Simple Machines Quiz on Friday

Pulleys – Page 70 January 15, 2014

Ms. SmithMrs. MaloneMs. Cedillo

Flagpole = fixed pulley (fixed=stays in same spot; does not move)Fixed pulleys only change the direction of the force; do not reduce force

Simple Pulley Set-Up January 15, 2014

Ms. SmithMrs. MaloneMs. Cedillo

• Follow directions to set up your simple fixed pulley

• Lift various objects with pulley

• Use spring scale to determine how much force is needed to lift objects with and without pulley

• Fill in Data Table in journal on page 71

Object Force (N) Needed to lift WITH pulley

Force (N) Needed to lift WITHOUT pulley

Movable Pulleys January 15, 2014

Ms. SmithMrs. MaloneMs. Cedillo

• Movable pulley – more than one pulley that can move• The more pulleys, the more mechanical advantage• Does the spring scale confirm this?

Movable Pulley Demo January 15, 2014

Ms. SmithMrs. MaloneMs. Cedillo

• Movable Pulley Demo OR Lab with CPO pulleys

• Eureka! Pulleys

Interesting Pulley Info! January 15, 2014

Ms. SmithMrs. MaloneMs. Cedillo

Rube Goldberg Pulley contest 2014: http://www.rubegoldberg.com/

Rube Goldberg Machine – OK GO music video

Pulleys Exit Ticket #2 January 15, 2014

Ms. SmithMrs. MaloneMs. Cedillo

What is the difference between a fixed pulley and a movable pulley?

Which gives you a greater mechanical advantage?

Simple Machines Extension (extra time) January 15, 2014

Ms. SmithMrs. MaloneMs. Cedillo

1. Divide page ____ into six boxes.2. In the upper left-hand corner of each box, write the

following words: inclined plane, pulley, lever, wheel and axle, wedge, screw

3. In our journals, we will walk around the school recording as many examples of simple machines as we can in these boxes.

Voice levels in hallway = 0!!!!!!* (SIGN LANGUAGE ONLY!)*unless given permission

Simple Machines January 17, 2014

DO NOW:Date: January 17, 2014 6.8E investigate how inclined planes and pulleys can be used to change the amount of force needed to move an object.

Q?: What is the difference between a fixed pulley and a movable pulley?

Ms. SmithMrs. MaloneMs. Cedillo

Simple Machine Quiz January 17, 2014

Clear your deskVoice Level 0Read silently until everyone is finished

Ms. SmithMrs. MaloneMs. Cedillo