Question

question 7
which of the following is an example of a second - class lever?
fishing rod
scissors
see - saw
wheelbarrow

Explanation:

To determine a second - class lever, we recall the definition: in a second - class lever, the load is between the effort and the fulcrum.

• A fishing rod is a third - class lever (effort between load and fulcrum).
• Scissors can act as a first - class lever (fulcrum between effort and load, depending on use) or a combination, but not second - class.
• A see - saw is a first - class lever (fulcrum between two loads/efforts).
• A wheelbarrow has the load (the material in the wheelbarrow) between the effort (the force we apply to lift the handles) and the fulcrum (the wheel). So it is a second - class lever.

Answer:

Wheelbarrow