PEDU 520: Levers

Which of the following is NOT a component of anatomical levers?

• Bone

• Joint

• Muscle

• Ligament

What is the role of the fulcrum in a lever system?

• To apply force

• To provide resistance

• To act as a pivot point

• To increase load

What happens to the resistance force when the motive force is increased in a lever system?

• It decreases

• It remains the same

• It increases

• It disappears

What is the resistance arm (RA) in a lever?

• The perpendicular distance between the fulcrum and the line of resistance force

• The distance from the fulcrum to the effort point

• The total length of the lever

• The distance from the fulcrum to the end of the lever

Which of the following is NOT a component of a lever?

• Fulcrum

• Motive arm

• Resistance arm

• Pulley

What happens to the resistance force if the motive arm is lengthened?

• It increases

• It decreases

• It remains the same

• It becomes zero

Which of the following is NOT a first class lever?

• Hammer

• Scissors

• Crowbar

• Wheelbarrow

What is the relationship between effort and load in a first class lever?

• They are on opposite sides of the fulcrum

• They are on the same side of the fulcrum

• They are equal in magnitude

• They are both at the fulcrum

Which exercise is mentioned as an example related to 2nd class levers?

• Squat

• Push-up

• Pull-up

• Jumping jack

What is the role of the fulcrum in a second class lever?

• It provides the effort

• It supports the load

• It acts as the pivot point

• It reduces the load