Question

Brief explain about the lever system of body

Answer 1

Answer:

A lever is a bar that turns on a stationary point called a fulcrum, When a push or a pull is exerted on one end of  the bar ,the pressure that results is called the force. The object that is lifted on the other end is called the load.  

Explanation:

There are three parts to all levers:

• The point at which the lever of the body rotates referred to as  the fulcrum, for example,a door rotates on its hinges therefore the hinges are the fulcrum of the door.

• The force which is applied to the lever, can either be a push or pull, it is referred to as effort.on a door the effort will be locates on its handle/door knob

• Also called the output force is the load and this refers to the force that the lever emits in response to the effort applied to the lever. For a door the output will be the movement of the door to any desired direction.

There are three classes of levers depending on the position of the fulcrum. the classes are listed as;

• First class levers ; This kind of body levers have the fulcrum( the stationary/unmoving point) at the middle of the effort and the load. Examples of first class levers include the pliers , the seesaw balance and the crowbar.

• Second class levers; this kind or type of levers have the load existing between the fulcrum and the effort. Examples of such kind  of levers include the wheelbarrow, staplers and can-openers

• Third class levers; the last type of lever is depicted by bodies that have the effort between the fulcrum and load, examples of third class levers include shovel, human arms,tweezers etc.