what distinguishes first class levers from both second and third class levers? a. the fulcrum is between the…
what distinguishes first class levers from both second and third class levers? a. the fulcrum is between the load and effort. b. there is a fulcrum on both sides of the load. c. greater effort is required to move the load. d. the first class lever is not found in the human body. please select the best answer from the choices provided. a b c d
Answer
Brief Explanations:
In first - class levers, the fulcrum is positioned between the load and the effort. Second - class levers have the load between the fulcrum and effort, and third - class levers have the effort between the fulcrum and load. Option A correctly describes this key difference. Option B is incorrect as it's not a characteristic of first - class levers. Option C is wrong because the effort required depends on the lever's mechanical advantage and not the class alone. Option D is false as first - class levers are present in the human body (e.g., the neck joint).
Answer:
A. The fulcrum is between the load and effort.