3 Classes of Levers

F

L

E

1st Class has fulcrum in the middle.

2nd Class has load in the middle.

3rd Class has effort in the middle.

1

2

3

A first-class lever is a lever in which the fulcrum is located in between the effort and the load. This is the lever that you think of whenever you think of levers.

a can opener

a hammer

a see-saw

E

E L L

F

a pair of pliers

L

a pair of scissors

nails clipper

F L

F E

E

E

E

F

E

F

E

F

(when it’s used to pull nails)

L

L

E

The second-class lever is a little strange. In a second-class lever, the load is between the fulcrum and the effort.

a paper cutter

L

a wheel-barrow

F

E

E

L F F

F

a nut-cracker

L

L

E

E

E

L

a bottle opener

E

This fellow is the oddest of all. The thirdclass lever has the effort between the load and the fulcrum. a broom

L E

F

a stapler

E

F

E

L L

F

a baseball bat

L F

a fishing rod

F

your arm

F E

E

F

egg slicer

E

L

(your elbow or wrist is the fulcrum)

a hammer

E F

L tweezers

L

(when it’s used to hammer nails)

Science Notes Year 6 - Unit 7 Machines (Levers).pdf

Page 1 of 2. 3 Classes of Levers. F. 1. L. 2. E. 3. a can opener. a pair of pliers. A first-class lever is a lever in which the fulcrum is. located in between the effort ...

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