stretch
Definition
The verb "stretch" has several meanings. It can mean to make something longer or wider, to extend something in time or space, or to exert oneself to the utmost.
In the context of physical activity, "stretch" means to extend the muscles and tendons of the body. Stretching can be done before, during, or after exercise. It helps to improve flexibility and range of motion, and it can also help to prevent injuries.
How can the word be used?
The farmer stretched the fence to make it longer.
Different forms of the word
Noun: stretch (plural: stretches).
Verb: to stretch.
Adjective: stretchy.
Adverb: stretchily.
Etymology
The word "stretch" comes from the Old English word "streccan", which means "to extend". It was first used in English in the 8th century.
The word "to stretch" means to extend something by pulling it. It can also mean to extend something in time or space.
The word "stretchy" means that something can be stretched.
The word "stretchily" means in a stretchy way.
Question
What materials can be stretched?
AQA Science Exam Question and Answer
Question:
Describe the concept of elasticity and how materials stretch under the influence of an applied force. Discuss the difference between elastic and plastic deformation, and provide an example of a material that exhibits each type of behaviour.
Answer:
Elasticity refers to a material's ability to stretch when subjected to an applied force and return to its original shape upon force removal. When a material is stretched, its molecules or atoms are temporarily displaced from their equilibrium positions. The extent of stretching is determined by the material's Young's modulus, a measure of its stiffness.
Elastic deformation occurs when a material can stretch and return to its initial state once the force is removed. For example, a rubber band exhibits elastic behaviour. When pulled, it elongates, but once released, it regains its original length.
Plastic deformation, on the other hand, results in permanent changes to a material's shape after force removal. A common example is bending a metal paperclip multiple times – eventually, it loses its original form and shape.
The distinction between elastic and plastic deformation is vital in engineering and manufacturing. Materials with high elasticity, like springs, absorb and release energy effectively, making them suitable for applications requiring repetitive loading. Those with plastic deformation, like the metal used in construction, may be designed to resist yielding and maintain structural integrity under significant loads.