1. Lever Systems Flashcards
What are the three components of a lever system?
Fulcrum, effort, and load.
True or False: In a first-class lever, the fulcrum is located between the effort and the load.
True.
Fill in the blank: A lever system allows a small amount of _____ to move a larger load.
effort.
Which class of lever has the load between the fulcrum and the effort?
Second-class lever.
What is an example of a first-class lever in the human body?
The neck when lifting the head.
In which class of lever is the effort applied at one end and the load at the other?
Third-class lever.
True or False: Third-class levers are generally more efficient than first-class levers.
False.
What is the mechanical advantage in a lever system?
The ratio of the load force to the effort force.
Give an example of a second-class lever.
A wheelbarrow.
What is the primary function of a lever system in physical activity?
To increase the efficiency of movement and reduce the effort needed to perform work.
Fill in the blank: The distance from the fulcrum to the effort is called the _____ arm.
effort.
Which type of lever is most commonly found in the human body?
Third-class lever.
True or False: In a second-class lever, the effort is applied at the same end as the load.
False.
What does a higher mechanical advantage indicate about a lever system?
It indicates that less effort is required to lift a load.
What type of lever is a seesaw?
First-class lever.
