Assuming you mean 'fourth class lever' as in respect to a sports injury, then no such thing exists according to 'The American College of Sports Medicine'.
class 3
THREE CLASSES OF LEVER There are three classes of lever and each class has fulcrum, load and effort which together can move a heavy weight. CLASS 1 The workman uses a trolley to move the large packing case. The fulcrum is the wheel. CLASS 2The gardener uses a wheel barrow to lift tools and garden waste. The load is in the centre of the barrow CLASS 3 The fisherman catches the fish which becomes the load at the end of the lever.
A Class 2 lever has the load in-between the effort and the fulcrum. An example is a wheelbarrow, Effort is at the handles, the wheel is the fulcrum, and load is the weight carried on the wheelbarrow.
second class lever
It is a Class 1 Lever because they are like big scissors
The biceps is an example of a class 3 lever. The triceps is an example of a class 1 lever.
2nd class lever
No it is an example of a third class lever
No. It's an example of a Second Class lever.
Arm is the example of 2nd class lever.
Arm is the example of 2nd class lever.
The human arm is an example of a 3rd Class lever when bent , but when u straighten it , it becomes a 1st Class lever ~
Answer #1:It is a third class lever.=====================Answer #2:It is a second class lever.
it is a 1st-class lever
There are three types of lever, with examples as follows: A seesaw (teetertotter) is a Class 1 lever A wheel barrow is a Class 2 lever A pair of scissors is a Class 3 lever
A cane
Tongs can indeed be considered an example of a second-class lever. In a second-class lever, the load is situated between the effort (or force applied) and the fulcrum.