FCTC Written Study Guide With 100%
Correct Answers
Classes of Levers - correct answers ✔✔Class 1, Class 2, Class 3
Class 1 Levers - correct answers ✔✔Fulcrum is in the middle, with the effort (input) force on
one side of the fulcrum and resistance (output) on the other side.
Mechanical Advantage greater or less than 1
Ex: Seesaw, Crowbar, Pair of Scissors.
Class 2 Levers - correct answers ✔✔Resistance is in the middle, the effort is applied on one side
of the resistance and the fulcrum on the other side.
Mechanical Advantage always greater than 1
Ex: Wheelbarrow, nutcracker, bottle opener, or the brake pedal of a car.
Class 3 Levers - correct answers ✔✔Effort in the middle, the resistance is on one side of the
effort and the fulcrum is located on the other side.
Mechanical Advantage always less than 1
Ex: Pair of tweezers, human mandible
Lever Definitions - correct answers ✔✔Lever machine consisting of a beam or rigid rod pivoted
at a fixed hinged, or fulcrum.
Input Force = Effort
Output Force = Load or Resistance
What does "fre, 123" mean? - correct answers ✔✔Fulcrum is in the middle for Class 1 Levers
Correct Answers
Classes of Levers - correct answers ✔✔Class 1, Class 2, Class 3
Class 1 Levers - correct answers ✔✔Fulcrum is in the middle, with the effort (input) force on
one side of the fulcrum and resistance (output) on the other side.
Mechanical Advantage greater or less than 1
Ex: Seesaw, Crowbar, Pair of Scissors.
Class 2 Levers - correct answers ✔✔Resistance is in the middle, the effort is applied on one side
of the resistance and the fulcrum on the other side.
Mechanical Advantage always greater than 1
Ex: Wheelbarrow, nutcracker, bottle opener, or the brake pedal of a car.
Class 3 Levers - correct answers ✔✔Effort in the middle, the resistance is on one side of the
effort and the fulcrum is located on the other side.
Mechanical Advantage always less than 1
Ex: Pair of tweezers, human mandible
Lever Definitions - correct answers ✔✔Lever machine consisting of a beam or rigid rod pivoted
at a fixed hinged, or fulcrum.
Input Force = Effort
Output Force = Load or Resistance
What does "fre, 123" mean? - correct answers ✔✔Fulcrum is in the middle for Class 1 Levers
