+

By: Disha &

Haena

+What is an Elevator?

Another name (lift)

Call it as a transport

Moves people easily

Different levels of floors

+ History of the elevator Many people invented ( B.C )

Counterweight

Pulley System

Elisha Graves Otis ( 1811 – 1861)

Otis Safe Elevator

Become famous

+Why was it made?

Easier transportation

Emergency or to not be late.

Time and energy

Easy way

+How does it work?

This invention has a lot of components such as sheave, pulley, counterweight,etc… The ropes is attached

The motor makes the car move

Counterweight

http://www.vtaide.com/png/George/elevator.htm

This is the picture of sheave

This is the picture of pulley

This is the picture of counterweight

+What simple machine does it use?

Pulley System

+How do the simple machines make the work easier?

For an elevator, it uses the pulley system.

- Pulley : simple machine

- Magnifies the force

- Less effort

< More pulleys = Less effort>

+Advantages / Disadvantages

Advantages

- Time

- Our Energy

Disadvantages

- Stairs are faster

- Exercise

- Germs

- Claustrophobia

Claustrophobia

+One World- Social Impact

Relates to people

This invention is for human

It changed world

+Bibliography "Businessman Waiting for a Slow Elevator Clipart - Royalty Free Clipart Picture." Clipart Guide.com - Clip

Art, Pictures, Stock Photos, Web Graphics. N.p., n.d. Web. 20 Apr. 2011. <http://www.clipartguide.com/_pages/0060-0808-2614-3103.html>.

"Elevator." Wikipedia, the Free Encyclopedia. Web. 18 Apr. 2011. <http://en.wikipedia.org/wiki/Elevator>.

"Elevator - why was the elevator made?." Wikipedia, the free encyclopedia. N.p., n.d. Web. 19 Apr. 2011. <http://en.wikipedia.org/wiki/Elevator

"How Does an Elevator Work?" Virtual Teacher Aide. Web. 18 Apr. 2011. <http://www.vtaide.com/png/George/elevator.htm>.

Leishman, Ron. Royalty-Free (RF) Clip Art Illustration of a Cartoon Confused Businessman Waiting By An Elevator. ClipartOf. http://www.clipartof.com/details/clipart/439624.html. April 19th 2011.

Morgan, Lee. "Disadvantages of Elevators | EHow.com." EHow | How to Videos, Articles & More - Trusted Advice for the Curious Life | EHow.com. Web. 20 Apr. 2011. http://www.ehow.com/list_6828149_disadvantages-elevators.html.

Yen ne, Bill, and Morton Grosser. 100 Inventions That Shaped World History. San Francisco, CA: Bluewood, 1993. Print. Elisha-Otis. Elevtaorhistory. Elevator