Question

tree pruners are examples of which class of lever?

Explanation:

Step1: Recall lever classes

First - class lever: Fulcrum between effort and load. Second - class lever: Load between effort and fulcrum. Third - class lever: Effort between load and fulcrum.

Step2: Analyze tree - pruners

Tree - pruners have the fulcrum (the joint where the two parts meet) between the effort (applied by hands) and the load (the branches being cut).

Answer:

First - class lever.