1. Today’s Agenda…9/26
Bellringer: What kind of graph is used to show the change in distance of an object over time?
Review simple machine chart
Edheads Website

2. Simple Machines Chart Study Pack #16

3. The Pulley A grooved wheel with a rope
Changes the direction of the input force
Page 147
Examples: window shade, well, sail boat, elevator

4. The Lever A rod or plank that pivots on a fixed point
Allow you to apply less force
Page 148
Examples: using a screwdriver to open a can, a wheelbarrow, a bottle opener

5. The Wheel and Axle
Two round objects that are attached by a bar and rotate together
Allow you to apply less force
Page 149
Examples: door knob, roller skates, car

6. The Inclined Plane Sloped surface Allow you to apply less force
Page 149
Examples: ramp, slide, stairs

7. The Wedge A moving inclined plane with one or two slopes
Changes the direction of the input force
Page 150
Examples: knife, axe, teeth, zipper

8. The Screw An inclined plane wrapped around a pole
Changes the direction of the input force
Page 150
Examples: spiral staircase, jar lid, key rings

9. Gear Toothed wheels that fit into one another
Allow many wheel and axles to turn at once
Examples: clocks, toys

10. Compound Machine A combination of simple machines
Example: pencil sharpener

11. Edheads