Classes of Levers

First class lever

• the fulcrum is in the middle of the effort and the load.

• the load is in the middle between the fulcrum and the effort.

• the effort is in the middle between the fulcrum and the load.

2nd Class lever

• the load is in the middle between the fulcrum and the effort.

• the fulcrum is in the middle of the effort and the load.

• the effort is in the middle between the fulcrum and the load.

3rd Class Lever

• the fulcrum is in the middle of the effort and the load.

• the effort is in the middle between the fulcrum and the load.

• the load is in the middle between the fulcrum and the effort.

What are the 3 forces found on a lever called?

• Fulcrum

• Effort

• Load

• Gravity

What type of lever is this

• 1st class

• 2nd class

• 3rd class

What type of lever is this

• 1st class

• 2nd class

• 3rd class

A force can move a resistance through a greater range of motion when the force arm is shorter than the resistance arm. This creates a

• Speed multiplier

• Force multiplier

Label the resistance, axis and force

A axis is...

• The point an arm/lever rotates around

• Where the middle of a lever is

• Where the force is applied

In a second class lever the displacement of the force point is greater than the displacement of the resistance point. This means...

• Less work is applied

• More work is applied

• The work is the same

• The force point creates a force multiplier on the resistance