Question

What are two examples of class two levers? Choose all that apply.

a
yo yo
b
hammer and nail
c
wheelbarrow
d
bottle opener

Answer 1

The two examples of class two levers from the options provided are:

c. wheelbarrow
d. bottle opener

In a class two lever, the load is positioned between the effort (the input force) and the fulcrum (the pivot point). A wheelbarrow has the load (the contents) in the middle, with the handles as the effort applied and the wheel as the fulcrum. A bottle opener also operates on a similar principle, with the bottle cap being lifted off as the fulcrum is at the edge of the bottle neck, and the effort applied is at the handle while the load (the cap) is in the middle.

(Note: The actual usage of a bottle opener may vary, and in some designs, they can function as a class one lever as well, but in the context of common examples, they are often considered class two.)