Simple machines

• Tools that make work easier

Lever•A lever is a stiff bar that moves about a fixed point •A lever is used to push, pull, or lift things

Screw

• Is an inclined plane wrapped around a cylinder or cone• Common use is to hold objects together

Pulley •A pulley is a wheel that has a rope wrapped around it •Pulleys can be used to lift heavy objects by changing

the direction or amount of force

Wheel and Axle •A wheel and axle consisted of a rod attached to a

wheel •Makes it easier to move and turn things

Inclined Plane • Flat surface that is rasied so that one end is higher than

the other• Helps move heavy objects up and down

Wedge •Wide at one end and pointed at the other to help split

or separate to objects

Group Project • I will split the class up into 6 groups • Group 1: Lever• Group 2: Pulley• Group 3: Wheel and axle• Group 4: Inclined Plane• Group 5: Wedge• Group 6: Screw

• Your group will get together today and begin research on your specific simple machine. I want you create a presentation that includes; a definition, how it makes work easier, and examples from home and school.

Next Step• You will begin work today and for homework (referencing these slides

if needed) you will bring in or take pictures of examples of your machine around your home. • On Thursday, you will bring back these objects or pictures to show to

your group. As a group you will decide which examples to present to your peers. • Your presentations are on 11/11