Levers

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.

Front

What are the three classes of levers?

Back

1. First Class Lever: Fulcrum is between the effort and the load. 2. Second Class Lever: Load is between the fulcrum and the effort. 3. Third Class Lever: Effort is between the fulcrum and the load.

Front

What is the fulcrum in a lever system?

Back

The fulcrum is the pivot point around which the lever rotates.

Front

What is the formula for calculating the mechanical advantage (MA) of a lever?

Back

MA = Load / Effort.

Front

What is the difference between ideal mechanical advantage (IMA) and actual mechanical advantage (AMA)?

Back

IMA is the mechanical advantage in a frictionless scenario, while AMA accounts for friction and other losses.

Front

What type of lever is a pair of tweezers?

Back

A third class lever.

Front

What type of lever is a seesaw?

Back

A first class lever.

Front

What type of lever is a wheelbarrow?

Back

A second class lever.

Front

What is the unit of force?

Back

Newton.

Front

What is the significance of the IMA being less than one?

Back

It indicates that the lever is designed to increase speed or distance rather than force.