machines [7] [levers] [2] [comprehension quiz]

A second class lever is where the load is in the middle between the fulcrum and the effort. Fulcrum: The fixed point around which the lever pivots. Load: The weight or resistance being moved. Effort: The force applied to move the load. A wheelbarrow is an example of a second class lever. A bottle opener is an example of a second class lever. A nutcracker is an example of a second class lever. A bike brake is an example of a second class lever. A pair of nail clippers is an example of a second class lever. A door hinge is an example of a second class lever. An ankle joint [when doing a jump shot] is an example of a second class lever.

Which of these diagrams shows a second class lever ? 1                       2                       3 Which of these diagrams is NOT a second class lever ? 1                       2                       3 Which of these combinations is a second 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.