1. Simple MACHINES
By: Sara Leach, Shirley Liu, Josh Stephenraj, Natalie Rose

2. Table of Contents Screws Lever Wedge Pulley Wheel and axel
Inclined plane

3. A simple machine that everybody uses!
Screws
A simple machine that everybody uses!

4. What’s a screw? One of the simple machines.
A cylinder with an inclined plane wrapped around it.
A shaft with a helical groove or thread formed on it’s surface.

5. Examples of screws: Jar lids Light bulbs Stools Key ring
Spiral staircase

6. Types of screws:
Countersunk slotted- a tradition screw with a long shank. Widely used, most suitable for traditional pieces.
Countersunk cross head- most popular
type of screw because the cross-shaped slot tends to prevent the screw driver from slipping.

7. Types of screw cont.
Roundhead- used mostly for fixing items. Top is rounded and sits out from surface.
Raised head- top is slightly rounded. Commonly used for fitting ironmongery, such as door handles.
Mirror screw- commonly used for fixing mirrors. A dome shaped chrome cover is then fastened into the top screw.

8. Wedge
Shaped like an inclined plane, but it is really a moving inclined plane.
A wedge has one wide end and one small end.
With a very weak force applied to the larger end all the force will move to the tip of the small end and move an object.
A wedge can also be round

9. The Wedge and The Lever
Simple Machines

10. Facts About the Wedge!
The Wedge is shaped like an inclined plain but it is really a moving inclined plane
It has one thick end and one thin end
A wedge can be round like the top of a nail
If you have a wedge that is very thick on the larger side then the wedge will work better

11. How Does a Wedge Work
If apply a weak force to the thicker side of the wedge then the force applied will the move to the thin end of the wedge and the same amount of force will be in a smaller area so it would be stronger than if you used the thick side…. Which wouldn’t work.

12. Examples of the Wedge
Nail
Door stopper
Fork Ax
Zipper
Knife

13. Facts About the Lever
A Lever is a rigged object that pivots about a fixed point
The Lever is used to lift weights
The lever has a bar that is supported at one point along the length of the bar
Fulcrum – the fixed point at which a lever pivots
There is always a Fulcrum on a lever

14. Uses of the Lever Wheel barel Nut Cracker Bottle openers Fishing poles
Shovels
Baseball bats
Seesaw
Scissors

15. By Natalie Rose

16. WHAT THE PULLEY IS USED FOR
The pulley is used for lifting objects that are to heavy for a human to lift. It is also for lifting things up high.

17. Types of pulleys
A crane
A pulley

18. Important facts about the pulley
The more pulleys you have the easer it is to lift heaver objects.
Archimedes was the inventor of the pulley.
The weight is spread out in each pulley

19. Uses for the Pulley
There are many uses for the pulley the main and most important one would be it helps people lift heavy objects. Also it brings objects.

20. We use it in everyday life!!
Wheel and Axel
We use it in everyday life!!

21. How does it work?
Wheel and axel works together by rotating in a circle.

22. What is a wheel and axel?
A lever that rotates in a circle around a center point of fulcrum.
Can also have a solid shaft with a center core as the axle.
Made of a large wheel secured to a smaller wheel called an axle.

23. Examples of wheel and axel:
Bicycle wheel
Ferris wheel
Gears

24. Bibliography:
chines/sciber/machine7.htm
+and+axel&gbv=2&ie=UTF- 8&um=1&sa=N&tab=wi