Simple Machines and Work Review

Front

What is a simple machine?

Back

A simple machine is a device that changes the direction or magnitude of a force, making work easier.

Front

Name the six types of simple machines.

Back

The six types of simple machines are the lever, wheel and axle, pulley, inclined plane, screw, and wedge.

Front

How does an inclined plane reduce the effort needed to lift an object?

Back

An inclined plane allows an object to be raised over a longer distance at a lower height, reducing the force needed to lift it.

Front

What is the mechanical advantage of a simple machine?

Back

The mechanical advantage is the ratio of the output force exerted by the machine to the input force applied to it.

Front

What role does a wheel and axle play in a simple machine?

Back

A wheel and axle reduce friction and make it easier to move or lift loads.

Front

How does a pulley make work easier?

Back

A pulley changes the direction of the force applied, allowing a person to lift heavy objects with less effort.

Front

What is a wedge and how does it function as a simple machine?

Back

A wedge is a simple machine that converts a force applied to its blunt end into forces perpendicular to its inclined surfaces, effectively splitting or cutting objects.

Front

In what way do simple machines help in performing work?

Back

Simple machines help by allowing a smaller input force to be used over a longer distance to achieve the same output work.

Front

What is the purpose of a screw as a simple machine?

Back

A screw converts rotational motion into linear motion, allowing for the fastening of objects together.

Front

How does the design of a doorknob exemplify the use of a wheel and axle?

Back

The knob of the doorknob acts as the wheel, while the shaft it turns on acts as the axle, making it easier to open the door.