Simple Machines and Mechanical Advantage Flashcard

Front

What is mechanical advantage?

Back

Mechanical advantage is the ratio of the output force produced by a machine to the input force applied to it. It indicates how much a machine multiplies force.

Front

How does friction affect mechanical advantage?

Back

Friction decreases mechanical advantage because it opposes the motion of the machine, requiring more input force to achieve the same output.

Front

What is the formula for calculating work?

Back

Work = Force × Distance

Front

How does the number of pulleys affect mechanical advantage?

Back

More pulleys increase mechanical advantage by distributing the weight and reducing the effort needed to lift a load.

Front

What does a mechanical advantage greater than 1 indicate?

Back

It indicates that the machine requires less effort to accomplish the same amount of work.

Front

What is a first-class lever?

Back

A first-class lever is a type of lever where the fulcrum is located between the input force and the output force.

Front

What is a second-class lever?

Back

A second-class lever is a type of lever where the output force is between the fulcrum and the input force.

Front

What is a third-class lever?

Back

A third-class lever is a type of lever where the input force is applied between the fulcrum and the output force.

Front

What is the principle of a pulley system?

Back

A pulley system uses wheels and ropes to change the direction of the force applied, making it easier to lift loads.

Front

What is efficiency in the context of machines?

Back

Efficiency is the ratio of useful work output to total work input, expressed as a percentage. It measures how well a machine converts input energy into useful work.