rest
Definition
Rest is a state of reduced activity in which the body is able to recover from exertion. It is important for both physical and mental health.
Physically, rest allows the body to repair tissues that have been damaged by activity. It also allows the body to replenish energy stores and to restore normal levels of hormones and other chemicals.
Mentally, rest allows the mind to relax and to process information that has been learned. It also allows the mind to clear away stress and to come back to tasks feeling refreshed and focused.
There are many different ways to rest, including sleeping, taking a break from activities, and spending time in nature. The best way to rest will vary depending on the individual and the situation.
How can the word be used?
The tired traveller found a place to rest.
Different forms of the word
Noun:
- a period of inactivity or repose.
- a place where someone or something can rest.
- the state of being at peace or in a state of equilibrium.
Verb:
- to cease from activity or motion.
- to put or lay to rest.
- to be at peace or in a state of equilibrium.
Etymology
The word "rest" comes from the Old English word "ræstan", which means "to lie down".
The first recorded use of the word "rest" in English was in the 9th century.
Question
What is rest and why is it important?
AQA Science Exam Question and Answer
Question:
Explain the concept of rest in physics and its relationship with motion. Provide an example to illustrate the principle of an object at rest and its implications in terms of Newton's first law of motion.
Answer:
In physics, rest refers to a state where an object is not in motion and remains stationary relative to its surroundings. The concept of rest is pivotal in understanding motion and the principles that govern it.
An example of an object at rest is a book placed on a table. When the book is not moving and remains still on the table, it is considered to be at rest. This principle aligns with Newton's first law of motion, often called the law of inertia. According to this law, an object at rest tends to stay at rest, and an object in motion tends to continue moving at a constant velocity unless acted upon by an external force.
In the case of the book on the table, its inertia keeps it at rest until an external force, like someone pushing it, overcomes this state of rest and initiates motion. Newton's first law of motion emphasises the importance of considering both rest and motion as inherent states of objects, with changes in these states requiring the influence of external forces.