machines [7] [levers] [3] [comprehension quiz]

A third class lever is where the effort is in the middle between the fulcrum and the load. Fulcrum: The fixed point around which the lever pivots. Effort: The force applied to move the load. Load: The weight or resistance being moved. A fishing rod is an example of a third class lever. A pair of tongs are an example of a third class lever. A spade or shovel is an example of a third class lever. A golf swing is an example of a third class lever. A stapler is an example of a third class lever. A broom is an example of a third class lever. A pair of chopsticks are an example of a third class lever.

Which of these diagrams shows a third class lever ? 1                       2                       3 Which of these diagrams is NOT a third class lever ? 1                       2                       3 Which of these combinations is a third class lever ? Fulcrum Effort Load                        Effort Load Fulcrum                        Effort Fulcrum Load

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. If you want to check how much you understand try the quiz on the right hand side. Hover over the pictures to magnify them to make them easier to see. To start the activity again just refresh the page.