1. Not always that simple, now are they?
Simple Machines
Not always that simple, now are they?

2. What Are Simple Machines?
6 Types
1. Levers
2. Inclined Planes
3. Pulleys
4. Wheel and Axle
5. Wedge
6. Screw

3. Machines What Else Do They Do?
Machines transfer mechanical energy from one object to another
What Else Do They Do?
Change the direction of a force
Change the amount of force
Change the distance or speed of force

4. Mechanical Advantage
How many times the machine multiplies force
The larger the mechanical advantage…the easier a machine makes your work

5. Levers 3 Classes of Levers
A simple machine consisting of a bar that pivots at a fixed point
Fulcrum: pivot point
3 Classes of
Levers
video

6. 1st Class Lever
In a first-class lever the fulcrum is located at some point between the effort and resistance forces.
Common examples of first-class levers include crowbars, scissors, pliers, tin snips and seesaws.

7. 2nd Class Lever
With a second-class lever, the load is located between the fulcrum and the effort force.
Common examples of second-class levers include nut crackers, wheel barrows, doors, and bottle openers.

8. 3rd Class Lever
With a third-class lever, the effort force is applied between the fulcrum and the resistance force.
Examples of third-class levers include tweezers, hammers, and shovels

9. Inclined Planes Simple machine that is a straight, slanted surface
The longer an inclined plane is compared to its height, the greater the mechanical advantage

10. The wheel allows the individual to spin the axle easier
Wheel and Axle
Consists of two circular objects of different sizes
1st Circular
Object
2nd Circular Object
The wheel allows the individual to spin the axle easier

11. Pulleys Consists of a grooved wheel that holds a rope or a cable

12. The more moving parts, the more mechanical advantage
Compound Machines
Machines that are made of two or more simple machines
The more moving parts, the more mechanical advantage

13. Wedge
The wedge is a modification of the inclined plane. Wedges are used as either separating or holding devices.
A wedge can either be composed of one or two inclined planes. A double wedge can be thought of as two inclined planes joined together with their sloping surfaces outward.
An example of a wedge is an ax

14. Screw The screw is also a modified version of the inclined plane.
While this may be somewhat difficult to visualize, it may help to think of the threads of the screw as a type of circular ramp (or inclined plane).

15. We do this by REDUCING… Friction Efficiency In Machine
Machines can be made to be more efficient
We do this by REDUCING…
Friction
Lubricants: substances that are applied to surfaces to reduce friction between them

16. Research Flip Book
1. Research the following types of simple machines. Make sure you include sub-types if there are any. For example, there are 3 types of levers; first, second and third class.
Lever
Incline plane
Pulley
Wheel and axle
Wedge
Screw
2. List 5 facts about each type of simple machine.
3. Draw a picture of each simple machine.
4. Describe how each simple machine makes our everyday lives easier and how we would struggle without them.