machines [6] [wheel and axle] [comprehension quiz]

A wheel and axle is a simple machine that consists of a wheel and a rod (the axle) that are connected so they rotate together. Here is an example of a bicycle where the wheels and pedals are connected to axles, allowing for efficient movement. Wind turbines are the new version of the windmill, creating electricity instead of flour. In this example of an electric fan the blades rotate around the central axle to create a cooling airflow. On this merry-go-round example, the central axle allows the platform to rotate providing great exercise for the dog.. In this pizza cutter, the circular blade acts as the wheel, and the handle is attached to the axle. In a ferris wheel the large wheel rotates around a central axle. In the example of a car steering wheel the larger the wheel the easier turning of the steering column (axle). A basic wheel and axle system consists of a wheel rotating around a central axle, and gears essentially add teeth to this basic structure.

Is this rotating door an example of a wheel and axle mechanism ? YES NO Is this hand drill an example of a wheel and axle mechanism ? YES NO Is this spiral staircase an example of a wheel and axle mechanism ? YES NO

There are 9 pictures in a grid. As you hover over each picture a blue screen appears on which there is some information about what is being shown in the picture. Read this information and look at each picture to make sure you understand what is being shown. If you want to check how much you understand try the quiz on the right hand side. To start the activity again just refresh the page.