Human Body Levers Quiz & Flashcards: Class 2 & 3

The load is the pivot point of a lever.

What distinguishes the three different classes of levers found in the human body?

The first class lever is the most common lever in the human body.

Swinging a tennis racket against a ball is an example of a third class lever.

What is the difference between velocity and acceleration?

Second and third class levers both have __________.

The ankle is a third class lever.

According to Newton's second law of motion, force is equal to mass times acceleration.

What lever has resistance between the axis (fulcrum) and the force (effort)?

What is BEST to say about a runner who is running at a constant velocity?

Lever Classifications and Examples

The pivot point of a lever is known as the fulcrum, not the load.
Levers are distinguished by the arrangement of their components: the effort, fulcrum, and load.
First-class levers are not the most common types found in the human body; examples include seesaws and some neck movements.
Swinging a tennis racket represents a third-class lever, where the effort is applied between the fulcrum and the load.

Physics Principles

Velocity and acceleration are distinct physical concepts; velocity refers to speed with direction, while acceleration measures the change in velocity.
The ankle is classified as a second-class lever, contrary to the statement that it is a third-class lever.
Newton's second law of motion asserts that force (F) equals mass (m) multiplied by acceleration (a), expressed as F = ma.
A second-class lever features the resistance positioned between the fulcrum and the applied effort.

Motion Characteristics

A runner maintaining a constant velocity will have zero acceleration, indicating no change in speed or direction.

Test your understanding of levers and their classifications in the human body with these health flashcards. Each card presents a statement or question about levers to evaluate your knowledge about this fundamental concept in biomechanics.