Name: newton's laws and everyday motion
Uploaded: 2025-05-22T09:06:01.000Z
Duration: 1 min 20 s
Channel: JoVE

K12 Standards

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South Carolina College and Career Ready Science Standards

High School

Physics

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Motion and Stability: Forces and Interactions

P-PS2-1

Newton's Law of Motion

ניתן להסביר תנועה או דממה של עצם באמצעות חוקי התנועה של ניוטון.
החוק הראשון קובע כי אובייקט במנוחה נשאר במנוחה ואובייקט בתנועה נשאר בתנועה במהירות ובכיוון קבועים, אלא אם כן מופעל על ידי כוח לא מאוזן.
כדורגל נשאר במנוחה עד שהוא נבעט על ידי שחקן ונשאר בתנועה עד שמופעל כוח חיצוני כדי להחזיר אותו למנוחה.
חוק התנועה השני קובע שכאשר כוח לא מאוזן פועל על גוף, הוא חווה תאוצה שיש לה גודל ביחס ישר לכוח ויש לה אותו כיוון כמו הכוח.
חשבו על אדם עם עגלה. כאשר הוא מפעיל כוח על העגלה, העגלה נעה לכיוון הכוח המופעל.
החוק השלישי קובע שלכל פעולה יש תגובה שווה והפוכה.
כאשר מכונית נוסעת פוגעת במשאית נייחת, היא מפעילה כוח שווה ומנוגד על המכונית.

<ol>
	<li>היבלר, R.C. (2016). מכניקה הנדסית - סטטיקה ודינמיקה. הובוקן, ניו ג'רזי: אולם פירסון פרנטיס. עמ' 4 \u2012 5.</li>
	<li>באר, פ"פ; ג'ונסטון, א.ר.; מזורק, ד"ו; קרומוול, פי ג'יי ועצמי, ב. (2019). מכניקה וקטורית למהנדסים - סטטיקה ודינמיקה. ניו יורק: מקגרו-היל. עמ' – 3.</li>
	<li>מרים, י"ל; Kraige, L.G., ובולטון, J.N. (2020). מכניקה הנדסית - סטטיקה. הובוקן, ניו ג'רזי: ג'ון ווילי. עמ' – 2.</li>
</ol>

חוק התנועה של ניוטון

<div style="direction:rtl">כאשר אנו מתבוננים בחפצים מסביבנו, שאלה אחת שעולה לנו בראש היא מדוע הם זזים או נשארים דוממים. ניתן להסביר את התשובה לשאלה זו באמצעות חוקי התנועה של ניוטון. חוקים אלה מתארים את העקרונות הבסיסיים של תנועה ואת השפעות הכוחות על עצמים. חוק התנועה הראשון, המכונה גם חוק האינרציה, קובע שעצם במנוחה יישאר במנוחה, וחפץ בתנועה ימשיך לנוע במהירות ובכיוון קבועים, אלא אם יפעל עליו כוח חיצוני . לדוגמה, כאשר קופסת הזזה מאטה מעצמה, הכוח החיצוני נטו על הקופסה הוא כוח החיכוך שפועל נגד תנועת הקופסה כדי להאט אותה. החוק הראשון של ניוטון מתייחס לגופים במנוחה או בתנועה במהירות קבועה. עם זאת, אם מהירות העצם משתנה, אז התנועה המואצת מטופלת על ידי החוק השני של ניוטון. חוק התנועה השני מתאר כיצד עצם מגיב לכוח לא מאוזן הפועל עליו. החוק קובע כי תאוצת עצם עומדת ביחס ישר לכוח המופעל עליו וביחס הפוך למסה שלו. לדוגמה, כאשר אדם פוגע בכדור, הוא נע בתאוצה ביחס ישר לכוח המופעל עליו. חוק התנועה השלישי, המכונה גם חוק הפעולה והתגובה, קובע שלכל פעולה יש תגובה שווה והפוכה. לדוגמה, אם אדם עומד על גלגיליות וזורק כדור קדימה, סביר להניח שהאדם יתחיל לנוע אחורה במהירות נתונה. לחוקי התנועה של ניוטון יש יישומים רבים בעולם המקרוסקופי האמיתי. לדוגמה, החוקים יכולים לשמש לתכנון מבנים ומכונות שיכולים לעמוד בפני כוחות חיצוניים. ניתן לחשב את המסלול של עצמים שמימיים או רקטות גם באמצעות חוקי התנועה של ניוטון. לסיכום, חוקי התנועה של ניוטון מספקים בסיס להבנת הקשר בין כוחות לתנועה. חוקים אלו הינם יסודיים בתחומי מדע רבים ויש להם יישומים מעשיים המשפיעים על חיי היומיום שלנו. בין אם אנו צופים במשחק כדורגל או משגרים חללית, אנו מסתמכים על החוקים הללו כדי להסביר את תנועתם של עצמים ואת השפעות הכוחות עליהם.</div>

כאשר אנו מתבוננים בעצמים סביבנו, אחת השאלות שעולות לנו בראש היא מדוע הם זזים או נשארים דוממים. את התשובה לשאלה זו ניתן להסביר באמצעות ...

Education

JoVE Core

Mechanical Engineering

הנדסת מכונות

Unit 1

יחידה 1

An Introduction to Statics

מבוא לסטטיקה

KEY TERMS AND CONCEPTS

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newton's laws and everyday motion

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 against the box and reduces its motion.

Newton's second law applies when velocity changes. It describes how an object responds to an unbalanced force. The law states that acceleration is directly proportional to the applied force and inversely proportional to mass. If a person hits a ball, the ball accelerates more when the force is larger.

Newton's third law is the law of action and reaction. It states that for every action, there is an equal and opposite reaction. A person on roller skates who throws a ball forward will move backward. Newton's laws are useful in the real macroscopic world. They help scientists design structures and machines that can withstand external forces, and they can also be used to calculate the motion of celestial objects and rockets.

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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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Newton's Laws and Everyday Motion

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