Name: mechanics in physics and engineering
Uploaded: 2023-09-22T11:49:18.000Z
Duration: 1 min 28 s
Channel: JoVE

K12 Standards

Arizona Science Standards

High School

Physical Science

HS.P3

HS.P3U2.7

An Introduction to Mechanics

역학은 힘의 작용에 따라 정지하거나 움직이는 물체의 상태에 대한 연구를 다루는 물리 과학의 한 분야입니다.
T는 일반적으로 강체 역학, 변형 가능한 물체 역학 및 유체 역학으로 분류됩니다.
강체 역학은 힘의 작용으로 인해 변형이 무시할 수 있는 물체를 연구합니다.
statics와 dynamics로 분기 할 수 있습니다. 정적(statics)은 정지해 있는 물체의 상태를 다루는 반면, 동역학(dynamics)은 움직이는 물체를 다룹니다.
역학은 운동학(kinematics)과 운동학(kinetics)으로 더 나뉘며, 여기서 움직임을 담당하는 힘은 각각 무시되고 고려됩니다.
변형 가능한 신체 역학은 힘의 작용에 따른 물체의 변형을 연구합니다.
유체의 운동과 힘에 대한 연구를 유체 역학이라고 합니다. 더 나아가 압축성 유체와 비압축성 유체로 분류됩니다.
건물, 자동차의 판 스프링, 크레인 후크, 공압 못 건, 유압 제동 시스템 및 산업용 로봇과 같은 구조물의 설계 및 분석은 역학의 원리를 기반으로 합니다.

<ol>
	<li>히벨러, R.C. (2016). Engineering Mechanics \u2012 정역학 및 동역학. 뉴저지 호보켄: 피어슨 프렌티스 홀. 3 \u2012 4</li> 쪽
	<li>맥주, F.P.; 존스턴, ER; 마주렉, D.F; 크롬웰, PJ 및 셀프, BP (2019). 엔지니어를 위한 벡터 역학 \u2012 Statics and Dynamics. 뉴욕 : McGraw-Hill. 2쪽 - 3</li>쪽
	<li>메리암, J.L.; Kraige, L.G. 및 Bolton, J.N. (2020). 엔지니어링 역학 \u2012 정역학. 뉴저지 호보켄: 존 와일리. 1쪽 - 2</li>쪽
</ol>

역학 소개

인간은 수세기 동안 배, 피난처, 피라미드, 무기, 농업 장비 및 더 많은 품목을 제작 과정이나 이론을 기록하지 않은 채 만들어 왔습니다. 따라서 역학의 기원부터 현재까지의 진화를 문서화하는 것은 매우 어려울 것입니다.

기록에 따르면 역학의 역사는 아리스토텔레스(기원전 384~322년)부터 시작됩니다. 그는 보편적인 종합을 목표로 역학을 물리 이론과 연관시켰습니다.

뉴턴은 역학을 힘의 작용 하에 정지해 있거나 움직이는 물체의 상태를 연구하는 물리과학의 한 분야로 정의했습니다. 역학은 공학과 과학의 다양한 분야에 중요한 응용이 가능한 물리학의 기본 영역입니다. 역학에 대한 연구는 일상적인 물체의 움직임, 기계와 장치의 동작, 다양한 시스템의 기능을 이해하는 데 필수적입니다. 

강체 역학은 힘의 작용에 따라 변형이 무시될 수 있는 물체를 다루는 역학의 한 분야입니다. 강체 역학은 역학과 정역학으로 나누어집니다. 정역학은 정지해 있는 물체의 상태를 다루는 반면 동역학은 움직이는 물체의 상태를 다룹니다. 동역학은 다시 운동학과 동역학으로 나누어지며, 전자는 운동을 담당하는 힘을 무시하고 후자는 이를 고려합니다.

반면 변형체역학은 힘의 작용에 따른 물체의 변형에 중점을 둡니다. 건설이나 제조에 사용되는 재료와 같은 재료의 거동을 이해하고 다양한 구조의 설계와 분석을 이해하는 것이 중요합니다.

유체역학은 유체의 운동과 힘을 연구하는 학문입니다. 그것은 광대한 분야이며, 거동에 따라 압축성 유체와 비압축성 유체로 분류됩니다. 유체역학은 실용적인 응용 분야가 많으며 유압 또는 공압 시스템, 유체 운송 시스템, 화학 처리 장비 등 다양한 시스템을 설계하고 분석하는 데 사용됩니다.

많은 구조물과 기계가 역학의 원리를 바탕으로 설계되고 분석됩니다. 예를 들어, 건물, 교량 및 기타 구조물의 설계는 재료의 강도, 중력 및 지구의 움직임을 평가하는 역학 원리에 따라 달라집니다. 역학의 원리는 판스프링, 유압 제동 시스템, 크레인 후크, 산업용 로봇, 공압용 못총과 같은 자동차 부품 설계에도 사용됩니다.

인간은 배, 피난처, 피라미드, 무기, 농업 장비 및 더 많은 품목을 과정이나 이론을 기록하지 않고 만들어 왔습니다.

Education

교육

JoVE Core

Mechanical Engineering

기계공학

Unit 1

제1단원

An Introduction to Statics

정역학 입문

KEY TERMS AND CONCEPTS

주요 용어 및 개념

mechanics in physics and engineering

Mechanics is a key branch of physics that explains how objects stay at rest or move when forces act on them. It also has major uses in engineering and science. The topic helps students understand everyday motion, machine behavior, and the way many systems work.

The recorded history of mechanics begins with Aristotle, who lived from 384 to 322 BC. He linked mechanics with physical theory and looked for a broad universal explanation. Later, Newton defined mechanics as the study of objects at rest or in motion under the action of forces.

Rigid body mechanics deals with objects that do not deform much when forces act on them. This area is divided into statics and dynamics. Statics studies objects at rest, while dynamics studies objects in motion.

Dynamics is further divided into kinematics and kinetics. Kinematics describes motion without focusing on the forces that cause it. Kinetics includes those forces and explains how they affect motion.

Deformable body mechanics focuses on how objects change shape under force. This is important for understanding materials used in construction and manufacturing. It also helps in the design and analysis of structures.

Fluid mechanics studies the motion of fluids and the forces within them. It is often divided into compressible and incompressible fluids, based on how the fluid behaves. This field is used in hydraulic and pneumatic systems, fluid transportation, and chemical processing equipment.

Principles of mechanics guide the design of many structures and machines. Buildings and bridges are analyzed for material strength, gravity, and earth movement. The same ideas also apply to automobile leaf springs, hydraulic braking systems, crane hooks, industrial robots, and pneumatic nail guns.

Mechanics in Physics and Engineering

an introduction to mechanics

Mechanics is a key branch of physics that explains how objects stay at rest or move when forces act on them. It also has major uses in engineering and science. The topic helps students understand everyday motion, machine behavior, and the way many systems work. The recorded history of mechanics begins with Aristotle, who lived from 384 to 322 BC. He linked mechanics with physical theory and looked for a broad universal explanation. Later, Newton defined mechanics as the study of objects at...

basic concept

Fundamental Quantities in Engineering Mechanics

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newton's law of motion

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Newton's laws explain everyday motion and the forces that change it. These three laws describe why objects move, stay still, or speed up. They also show how force and mass affect motion. Newton's first law is the law of inertia. It says an object at rest stays at rest, and an object in motion keeps moving at a constant speed and direction unless an external force acts on it. A sliding box that slows down on its own is a good example. In that case, friction is the net external force that works...

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units of measurement

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Mechanical engineering depends on units of measurement for precise and accurate calculations. These units give engineers a standard way to express and compare physical quantities. They are essential when designing and analyzing machines and mechanical systems. Many historical measurement systems have been used over time. Examples include the Babylonian system, the Roman system, the Egyptian system, the Olympian system, the British system, and the Indus Valley system. Today, the International...

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numerical calculations

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accuracy, limits, and approximation

Accuracy and Approximation in Calculations

Accuracy and approximation are important in calculations, especially in engineering. Accuracy means how close a measured value is to the true or actual value. Repeated measurements are often used in engineering mechanics to help make results more precise and accurate. The accuracy of a solution depends on empirical data and the results from different calculations or measurements. A cylindrical container filled with liquid is a simple example. Its volume can be found from the measured...

dimensional analysis

Using Dimensions to Check Physics Equations

Dimensional analysis is a useful way to check physics and engineering equations. It works by writing physical quantities in terms of basic dimensions such as mass, length, and time. Quantities like velocity, acceleration, and force are derived from these basic dimensions. This method helps compare measurements even when the units are different. It also checks whether an equation is dimensionally homogeneous. That means the powers of the fundamental dimensions must match on both sides of the...

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Statics Problem-Solving Steps for Beams

Statics problem-solving uses a step-by-step method to analyze bodies in equilibrium, especially beams. It is an important part of physics and engineering because the goal is to find practical and accurate answers for real situations. The process usually starts with a physical situation and then turns it into a mathematical model. That model often needs approximations and assumptions. Very small distances can be ignored when they are much smaller than the main dimensions, such as beam width...

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Learn how mechanics explains motion, forces, statics, dynamics, fluids, and material behavior, with real-world examples in structures and machines.

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mechanical engineering

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Mechanics in Physics and Engineering

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