Biomechanics Levers Flashcard

Front

What is a lever?

Back

A lever is a simple machine that consists of a rigid bar that pivots around a fixed point called the fulcrum, used to lift or move loads.

Front

What are the three classes of levers?

Back

The three classes of levers are: 1st Class (fulcrum between effort and load), 2nd Class (load between fulcrum and effort), and 3rd Class (effort between fulcrum and load).

Front

What is an example of a first-class lever?

Back

An example of a first-class lever is a seesaw.

Front

What is an example of a second-class lever?

Back

An example of a second-class lever is a wheelbarrow.

Front

What is an example of a third-class lever?

Back

An example of a third-class lever is a broom.

Front

In a first-class lever, where is the fulcrum located?

Back

The fulcrum is located between the effort and the load.

Front

In a second-class lever, where is the effort applied?

Back

The effort is applied on one side of the fulcrum.

Front

In a third-class lever, where is the load located?

Back

The load is located on the opposite side of the fulcrum from the effort.

Front

What is the mechanical advantage of a lever?

Back

The mechanical advantage of a lever is the ratio of the load force to the effort force, indicating how much the lever amplifies the input force.

Front

What is the purpose of a lever?

Back

The purpose of a lever is to make it easier to lift or move heavy objects by increasing the distance over which the effort is applied.