### Levers

Levers are an essential part of many mechanisms. They can be used to change the amount, the strength and the direction of movement.
The position of the force and the load are interchangeable and by moving them to different points on the lever, different effects can be produced. The fixed point of the lever about which it moves is known as the fulcrum. In this example the force and the load move in opposite directions. With the force three times closer to the fulcrum them the load lifted is only one third of the force but it move three times as far.

First order lever. Like a see-saw or balance, the load and the force are seperated by the fulcrum. As one moves up the orther moves down. The amount and the strength of the movement is proportianal to the distance from the fulcum

Second order lever. A wheel barrow is a second order lever. Here the load is between the force and the fulcrum.

This uses mechanical advantage to ease lifting of a large weight.

Third order lever.

Here the force is between the fulcrum and the load. Mechanical advantage is reduced but the movement at the load point is increased.

Saturday 4th Dec 2010 13:33

please can you explain more than just 1 sentence

thank you

Saturday 4th Dec 2010 14:14

### robives

Sure, what do you want to know?

Monday 3rd Oct 2011 15:25

### What are the 5 main mechanisms?

Monday 3rd Oct 2011 17:00

### robives

lever, linkages, grumpy, sleepy and salt & vinegar.

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Anyone any idea?

Tuesday 4th Oct 2011 16:51

### maxlrainer

Maybe the classical simple machines are meant:

Lever
Wheel and axle
Pulley
Inclined plane
Wedge
Screw

Tuesday 15th Nov 2011 17:11

are levers basically pivots or not?

Monday 21st Nov 2011 14:07

some examples of third order lever

Tuesday 22nd Nov 2011 10:19

### Smelter

Levers are beams that rotate about a pivot point.

Basically an arm on a hinge.

Tuesday 21st Feb 2012 00:57

fishin rod is an example of a third class lever

Thursday 17th May 2012 08:29

marry me rob!! i am in love with your drawings!! i love you!!

Tuesday 11th Sep 2012 10:07

oh rob i   love you to

Sunday 23rd Sep 2012 15:44

### Smelter

And gears are just levers in a circle.

http://www.wimp.com/manualtransmission/

Nice find Smelter! - RI

Wednesday 26th Sep 2012 21:12

I learned a lot from this website. I didn't fail computer class even! How awesome is that!?

Very! - RI

Wednesday 3rd Oct 2012 21:37

Rob Ives, do you specifically publish and generate everything on this website? If you do, I am awed. This web is amazing!

Yes I do :-) - RI

Wednesday 16th Jan 2013 09:44

### waterrocketsrule

.

"lever, linkages, grumpy, sleepy and salt & vinegar.

---

Anyone any idea?"

Thats funny LOLOLOLO

Wednesday 16th Jan 2013 13:28

### Smelter

Tired "teacher" joke. Northern England humour.

Thursday 31st Jan 2013 18:35

no 1st class levers have pivots like a see-saw a pivot is a fulcrum

Tuesday 26th Mar 2013 19:50

does anybody know what mechanisms to look at to turn downward vertical force into lateral force?

Bell crank I reckon - RI