IBSEHS Lever Systems in the Body

Fulcrum

the point at which the lever rotates

Load

the force applied by an object on the lever

Effort

the force applied by the lever to move an object

Functions of a lever

1. reduces the amount of force needed to move an object

2. increases the speed an object moves

1st Class lever

Fulcrum is in the middle, effort and load are on the outside

2nd class lever

the load is in the middle, effort and fulcrum are on the outside

3rd class lever

effort is in the middle, load and fulcrum are on the outside