Blade

Definition

A blade is the flat, elongated, and typically narrow portion of an object, such as a knife, sword, or propeller, that is used for cutting or thrusting.

Types of Blades

• Knife Blade: The cutting portion of a knife, usually made of metal and sharpened to a fine edge.
• Sword Blade: The long, sharp-edged weapon used for thrusting or cutting.
• Propeller Blade: The rotating airfoil that generates thrust in a propeller mechanism, such as those used in aircraft or marine vessels.
• Blade in Biology: The flat, wide part of a leaf or petal in plants.

Functions of Blades

Blades are used for a variety of functions, including:

• Cutting and slicing objects
• Thrusting and piercing
• Generating propulsion in machines, such as propellers
• Harvesting in agriculture

Study Guide

Here are some key points to remember about blades:

1. What are the different types of blades?
2. What are the functions of a blade?
3. How are blades used in different fields, such as in kitchen tools, weapons, and machinery?
4. What materials are used to make blades and how does it affect their functionality?