### Present Remotely

Send the link below via email or IM

Present to your audience

• Invited audience members will follow you as you navigate and present
• People invited to a presentation do not need a Prezi account
• This link expires 10 minutes after you close the presentation
• A maximum of 30 users can follow your presentation

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

### Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

# Levers

No description
by

## Jordan Nilsson

on 3 April 2015

Report abuse

#### Transcript of Levers

What is a Lever?
A rigid bar resting on a pivot
Used to help move a heavy or firmly fixed load with one end when pressure is applied to the other.
It is made out of a ridged object that pivots around a fulcrum (the point on which a lever rests/where it pivots)
How Does it Work?
transfers an applied force over a distance and exerting an output force on an object
increases the magnitude of the output force by sacrificing the distance the force is applied over
How to Calculate Mechanical Advantage
1.Indentify the fulcrum.
2.Identify the locations of the input and output forces.
3.Find the distance between the fulcrum and the input force (resistance arm).
4.Find the distance from the fulcrum to the output force (effort arm).
Equations
Example
First Class Lever
Examples:
1.Seesaw (also known as a teeter-totter)
2.Crowbar
3.Pliers (double lever)
4.Scissors (double lever)

Second Class Levers
Examples:
1.Wheelbarrow
2.Nutcracker (double lever)
3.The handle of a pair of nail clippers
4.An oar

Third Class Levers
Examples:
1.Human arm
2.Tongs (double lever) (where hinged at one end, the style with a central pivot is first-class)
3.Catapult
4.Any number of tools, such as a hoe or scythe
5.The main body of a pair of nail clippers, in which the handle exerts the incoming force

Levers
Emily Etchegary and Jordan Nilsson
Works Cited
http://iqa.evergreenps.org/science/phy_science/ma.html
http://www.edinformatics.com/math_science/simple_machines/lever.htm
http://www.ohio.edu/people/williar4/html/haped/nasa/simpmach/lever.htm
http://iqa.evergreenps.org/science/phy_science/ma.html
http://idahoptv.org/sciencetrek/topics/simple_machines/facts.cfm