All three classes
1st class
2nd class
3rd class
100
Name the class of this lever.
first class lever
100
A common playground equipment that acts as a first-class lever is this.
What is a seesaw?
100
A common example of a second-class lever you use when pushing up on your toes.
What is a calf raise? (Or standing on your tip-toes)
100
An example of a third-class lever in the body is the biceps acting to flex this part of the arm.
What is the forearm?
200
The point around which a lever rotates.
What is the fulcrum?
200
If the effort arm is longer than the load arm in a first-class lever, the lever increases this.
What is mechanical advantage?
200
Second-class levers always provide this because the effort arm is longer than this arm.
What is mechanical advantage?
200
In a third-class lever, this is positioned between the fulcrum and the load.
What is the effort?
300
This is the force used to move a resistance or load in a lever systemm.
What is the effort?
300
This ancient tool is an example of a first-class lever used to pry objects apart.
What is a crowbar?
300
This simple tool for opening a bottle is a classic example of a second-class lever.
What is a bottle opener?
300
This common tool, used to scoop or dig, functions as a third-class lever.
What is a shovel?
400
The load lies between the fulcrum and the effort.
What is a second class lever?
400
In a first-class lever, if the fulcrum is exactly in the middle between load and effort, the effort and load are said to be this.
What is balanced?
400
In a second-class lever, the effort is applied at this position relative to the fulcrum and load.
What is at the end opposite of the fulcrum?
400
In a third-class lever, this distance is always shorter than the load arm, making force production less efficient but increasing this.
Is this speed or range of motion?
500
In this lever type, the effort is applied between the fulcrum and the load.
What is a third class lever?
500
In the human body, when you nod your head backward, the neck muscles and head form this class of lever.
What is a first class lever?
500
Because the load is between the fulcrum and effort, the effort needed is always this compared to the load.
What is less?
500
The elbow joint acts as the fulcrum in this lever system when you perform a bicep curl.
What is a third class lever?