Classes of Levers

A lever is designed to

• decrease the amount of force required to do work

• decrease the amount of time required to do work

• increase the amount of energy needed to work

• decrease the amount of work done

The place where a lever pivots is called the _______.

• Force / Effort

• Fulcrum

• Load

• Rigid Bar

What class of lever does this picture show?

• First class lever

• Second class lever

• Third class lever

What class of lever does this picture show?

• First class lever

• Second class lever

• Third class lever

What class of lever does this picture show?

• First class lever

• Second class lever

• Third class lever

What class of lever is an old-fashioned scale?

• First class lever

• Second class lever

• Third class lever

What class lever is a wheelbarrow?

• First class lever

• Second class lever

• Third class lever

What class of lever is a broom?

• First class lever

• Second class lever

• Third class lever

What class of lever is a pair of tongs?

• First class lever

• Second class lever

• Third class lever

What class of lever is a fishing rod?

• First class lever

• Second class lever

• Third class lever