What do Newton’s first, second and third laws say? | Science

Abigail Brewer 3 years ago 3 min read

Isaac Newton was important English physicist. Born on December 25, 1642, he is considered the first man to prove that the natural laws that govern motion on Earth and those that govern the motion of planets or stars are the same. One of his most important contributions to the history of modern science is Newton’s three laws. These rules explain body movement, its causes and effects.

you can see: Isaac Newton: What are the world’s most important contributions?

What is Newton’s first law?

known as The law of inertiaNewton postulates that: “Every body at rest or uniform motion continues in a straight line, not far from the forces acting to change its position.”

According to this first law, the body cannot change its state by itself; In order to get out of a state of rest (zero velocity) or uniform rectilinear motion, a force must be acting on it. Therefore, if no force is applied and the body is at rest, it will remain that way; If the body is in motion, it will continue to move uniformly at a constant speed.

For example: A man leaves his motorcycle parked in his garage or friend’s house. There is no force acting on the car, so the next day the car remains in the same place.

What is Newton’s second law?

a call force of law, says the following: “The change in motion is directly proportional to the imprinted motive force and occurs according to the straight line along which that force is imprinted.”

Newton’s second law states that there is a relationship between the force acting on an object and its acceleration. This relationship is direct and proportional, and the force exerted on the body is directly proportional to the acceleration it will receive. In short, acceleration depends on the direction, magnitude, and feel of the total force applied and the mass of the object.

For example: the more force a person exerts when kicking a soccer ball, the greater the chance that the ball will play midfield, because its acceleration increases with impact.

What is Newton’s third law?

In the Law of action and reactionIsaac Newton explains: “With every action there is always an equal and opposite reaction, which means that the mutual actions of two bodies are always equal and directed in the opposite direction. ”

Newton’s third law states that when one object exerts a force on another, the latter responds with a reaction of equal magnitude and direction but in the opposite direction. The force exerted by the action corresponds to the reaction. For example: when a man walks over an object, he will receive the same force from the object he used with the blow.