Question

second and third class levers both have
a. the fulcrum between the effort and load
b. effort applied in the same place
c. two loads and fulcrums
d. the fulcrum at one end of the lever
please select the best answer from the choices provided.
a
b
c
d

Explanation:

To solve this, we analyze each option based on lever classes:

• Option A: In second - class levers, the load is between effort and fulcrum; in third - class, effort is between load and fulcrum. So fulcrum is at one end for both (second: fulcrum - effort - load; third: fulcrum - load - effort). So A is wrong.
• Option B: Effort is in different places (second: near fulcrum; third: between load and fulcrum). So B is wrong.
• Option C: Levers have one fulcrum and one load (plus effort). So C is wrong.
• Option D: For second - class levers (e.g., wheelbarrow), fulcrum is at one end (the wheel), load in middle, effort at other end. For third - class levers (e.g., fishing rod), fulcrum is at one end (hand holding rod), effort in middle, load at other end. So both have fulcrum at one end.

Answer:

D. the fulcrum at one end of the lever