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

An object&#39;s motion or stillness can be explained using Newton&#39;s laws of motion.
The first law states that an object at rest stays at rest and an object in motion stays in motion at a constant speed and direction unless acted upon by an unbalanced force.
A football stays at rest until it is kicked by a player and stays in motion until an external force is applied to bring it back to rest.
The second law of motion states that when an unbalanced force acts upon a body, it experiences an acceleration that has a magnitude directly proportional to the force and has the same direction as the force.
Consider a man with a cart. When he applies force to the cart, the cart moves in the direction of the applied force.
The third law states that for every action, there is an equal and opposite reaction.
When a moving car hits a stationary truck, it exerts an equal and opposite force on the car.

newton's law of motion

When we observe objects around us, one question that comes to mind is why they move or stay still. The answer to this question can be explained using Newton&#39;s laws of motion. These laws describe the fundamental principles of motion and the effects of forces on objects.
The first law of motion, also known as the law of inertia, states that an object at rest will stay at rest, and an object in motion will continue to move at a constant speed and direction unless acted upon by an external force. For example, when a sliding box slows down on its own, the net external force on the box is the friction force that acts against the box&#39;s motion to slow it down.
Newton&#39;s first law considers bodies at rest or in motion at a constant velocity. However, if the velocity of the object changes, then the accelerated motion is addressed by Newton&#39;s second law. The second law of motion describes how an object responds to an unbalanced force acting upon it. The law states that the acceleration of an object is directly proportional to the force exerted on it and inversely proportional to its mass. For example, when a person hits a ball, it moves with an acceleration directly proportional to the force applied to it.
The third law of motion, also known as the law of action and reaction, states that for every action, there is an equal and opposite reaction. For example, if a person stands on roller skates and throws a ball forward, then it is likely that the person will start moving backward at a given speed.
Newton&#39;s laws of motion have many applications in the real macroscopic world. For example, the laws can be used to design structures and machines that can withstand external forces. The trajectory of celestial objects or rockets can also be calculated using Newton&#39;s laws of motion.
In conclusion, Newton&#39;s laws of motion provide a foundation for understanding the relationship between forces and motion. These laws are fundamental to many fields of science and have practical applications that impact our daily lives. Whether we&#39;re watching a football game or launching a spacecraft, we rely on these laws to explain the motion of objects and the effects of forces on them.

When we observe objects around us, one question that comes to mind is why they move or stay still. The answer to this question can be explained using ...

Education

JoVE Core

Mechanical Engineering

Unit 1

An Introduction to Statics

KEY TERMS AND CONCEPTS

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.

Newton's Laws and Everyday Motion

an introduction to mechanics

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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...

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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...

newton's law of gravitational attraction

Gravity Between Masses and Distance

Newton’s law of gravitational attraction describes how gravity acts between two objects. Sir Isaac Newton built this law from empirical evidence and inductive reasoning. He published it in Philosophiae Naturalis Principia Mathematica, or the Principia, on July 5, 1687. The law says that the gravitational force between any two objects depends on their masses and their distance apart. The force is proportional to mass and inversely proportional to the square of the distance between the objects.

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key terms and concepts

Learn how Newton's three laws explain inertia, acceleration, and action-reaction forces. See how friction, balls, skates, rockets, and structures fit the rules.

Newton's Laws and Everyday Motion | JoVE K12

JoVE Core Mechanical Engineering offers concise, easy-to-understand animated videos covering key topics such as equilibrium, forces, truss analysis, and structural mechanics. Explore their real-world applications, and witness these concepts in action through scientist-led experiments.

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P-PS2-6.

Newton's Laws and Everyday Motion

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