1. Agenda 5/4/12 Assignment Date DL Simple Machines (#38)
Remote Review
Tues 5/8
Unit 7 Exam
Wed 5/9
Parents Signature
Thurs 5/10 DL
Simple Machines (#38)
Classes of Levers (#39)
Page #42 together.
Homework:
Simple Machines Review WS (#43)
Test next Wednesday

2. Simple Machines There are 6 simple machines. They are: Incline Plane
Wedge
Screw
Lever (3 classes of levers)
Wheel and Axle
Pulley
Incline planes: a slanted surface (ramp).
Wedge: a moving inclined plane.
Screw: a spiral inclined plane

3. Lever is a bar, board or circle that pivots about a fixed point called a fulcrum
First Class Lever: Fulcrum is located in the center between the effort force and resistance force.
Second Class Lever: Resistance force is between the fulcrum and the effort force.

4. Lever is a bar, board or circle that pivots about a fixed point called a fulcrum
Third Class Lever: Effort force between the fulcrum
and the resistance force.

5. Simple Machines Wheel and Axle: a lever that rotates on a circle.
Pulleys: a lever that rotates around a fixed point with the use of a pulled rope.

6. Which Simple Machine? Hammer Wrench Wedge Wheel and Axle
1st Class Lever

7. Which Simple Machine?
Flag and Pole
Screwdriver
Pulley
Wedge

8. Which Simple Machine?
Staples
Paint roller
Wedge
Wheel and Axle

9. Which Simple Machine? Rope and pulley Paintbrush Pulley
1st Class Lever

10. Which Simple Machine?
Ratchet
Doorknob
Wheel and Axle
Wheel and Axle

11. Which Simple Machine?
Saw
Light Bulb
Screw
Wedge

12. Which Simple Machine? Scissors Seesaw Wedge 1st Class Lever

13. Which Simple Machine?
Drill Bit
Crowbar
Wedge
1st Class Lever
Wedge

14. Which Simple Machine? Shovel Car Jack Wedge Wheel and Axle
2nd Class Lever

15. Which Simple Machine? Wheelbarrow Rake Wedge Wheel and Axle
2nd Class Lever
1st Class Lever

16. Which Simple Machine? Forceps Pliers Wedge 1st Class Lever Wedge

17. Which Simple Machine?
Wheelchair
Putty Knife
Wedge
Wheel and Axle

18. Which Simple Machine?
Ferris Wheel
Wheel and Axle