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5.2 Levers (not complete - include examples)

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Total cards: 10•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (10)

#1
Front (Question)

Identify what components a lever consists of

Back (Answer)

• Fulcrum • Resistance • Effort

#2
Front (Question)

Bones act as ___. The joints are the ___, the ___ is provided by the ___ and the ___ is the weight of the body part/object being moved against the force of ___.

Back (Answer)

Bones act as lever. The joints are the fulcrums, the effort is provided by the muscles and the resistance is the weight of the body part/object being moved against the force of gravity.

#3
Front (Question)

Identify the classifications of levers

Back (Answer)

First class lever Second class lever Third class lever

#4
Front (Question)

Identify and describe the classifications of levers

Back (Answer)

First class lever - EFR Second class lever - FRE Third class lever - FER

#5
Front (Question)

Explain what is meant by a mechanical advantage and disadvantage

Back (Answer)

Mechanical advantage: the force arm is longer than the resistance arm, meaning the lever system can move a large load/resistance over a a short distance and needs little force/effort. It has a small range of movement. The lever can overcome a large load/resistance with relatively little effort. Mechanical disadvantage: the resistance arm is greater than the force arm. This lever system cannot move as heavy a load/resistance but can do it faster. It has a large range of movement. be moved is said to provide a mechanical disadvantage.

#6
Front (Question)

Give an example of a first class lever in the body

Back (Answer)

• Neck extension • Tricep Extension

#7
Front (Question)

Give and example of a second class lever in the body

Back (Answer)

• Ankle during plantar flexion

#8
Front (Question)

Give an example of a third class lever in the body

Back (Answer)

Third class levers can be found anywhere else in the body: • Hip • Knee • Elbow flexion

#9
Front (Question)

Explain what mechanical advantage/disadvantage depends on

Back (Answer)

Mechanical advantage/disadvantage depends on the length of the effort arm and the resistance arm. The effort arm is the distance between the fulcrum and the ‘effort’. The resistance arm is the distance between the fulcrum and the resistance.

#10
Front (Question)

Explain the characteristics of mechanical advantage and disadvantage

Back (Answer)

Mechanical advantage: when the effort arm is longer than the resistance arm. The lever can move a large load over a short distance with little effort. Small range of movement Mechanical disadvantage: when the resistance arm is longer than the effort arm. The lever cannot move as heavy load as mech. adv. but can do it faster. Large range of movement.