The law of free fall, the formula of the law of free fall

An object that falls without any resistance and only under the action of gravity is called "free fall". Such as an object that begins to fall from a resting state under the gravitational pull of the earth. The sky above the Earth's surface can be seen as a constant gravitational field.

Without taking into account atmospheric drag, the free fall motion in this region is a uniformly accelerated linear motion. Its acceleration is constant equal to the acceleration g due to gravity. Although the gravitational force of the Earth is inversely proportional to the square of the distance from the object to the center of the Earth, the radius of the Earth is much larger than the distance traveled by the free fall, so the gravitational force can be regarded as constant near the ground, and the acceleration of the free fall is an immutable constant.

It is a uniformly accelerated linear motion with zero muzzle velocity.

Free fall formula: initial velocity vo = 0, final velocity v = gt, fall height h = 1 2gt. Free fall refers to the motion of a conventional object with zero initial velocity only under the action of gravity, which is called free fall motion.

Free fall formula: initial velocity vo = 0, final velocity v = gt, fall height h = 1 2gt. The free fall accomplice refers to the movement of the conventional body only under the action of gravity, and the initial velocity is zero, which is called the movement of the falling body from this time.

The law of free fall was proposed by the Italian physicist Galileo Galilei in the 16th century.

The law of free fall is one of the fundamental laws in physics, which describes the law of motion of objects in free fall under the action of gravity. Through experiments and theoretical analysis, he discovered the laws of free fall motion, which laid the foundation for later physics research. Details are as follows:

1. Definition of free fall

Falling by a body refers to the motion of an object falling freely without any resistance under the force of gravity. In free fall, the velocity of the object will continue to increase, and the acceleration will be constant, and this acceleration is the acceleration of gravity, which is usually expressed by g, and its magnitude is about meters and seconds.

Second, the content of the law of free fall

The law of free fall has three aspects:

1. The first law: the trajectory of a free fall is a parabola.

2. The second law: the acceleration of a free fall is constant, the magnitude is the gravitational acceleration g, and the direction is downward.

3. The third law: the velocity of a free falling body increases with time, and the velocity is proportional to time and has nothing to do with the mass of the object.

3. Application of the law of free fall

The law of free fall has a wide range of applications in physics, and here are a few common applications:

1. Calculate the velocity and displacement of the free fall

The law of free fall can be used to calculate the velocity and displacement of an object in free fall motion. According to the law of free fall, the velocity of an object is proportional to time and the displacement is proportional to the square of time, so the velocity of an object can be calculated by measuring time and displacement.

2. Calculate the acceleration of a free fall

The law of free fall can be used to calculate the acceleration of an object in the motion of a falling body. According to the law of free fall, the acceleration of an object is constant and the magnitude is the acceleration g of gravity, so the acceleration of an object can be calculated by measuring the velocity and time of the object.

3. Study the motion of objects

The law of free fall can be used to study the laws of motion of objects. Through experimental and theoretical analysis, it is possible to derive the laws of motion of objects in free fall, so as to better understand other laws and principles in physics.

4. It is applied to engineering design

The law of free fall can be applied to engineering design. For example, when designing tall buildings, the effects of free fall need to be considered to ensure the structure and safety of the building.

The law of free fall was discovered by Galileo. Before the 17th century, scientists believed that heavy things would fall faster than light things, and Aristotle, the ancient Greek philosopher and scientist, thought so. In 1590, Galileo challenged this notion.

Gabi Cinillo decided to conduct an open experiment at the Leaning Tower of Pisa in Italy. Let a ten-pound and a one-pound iron ball free fall from the top of the tower at the same time, and the result is that both balls hit the ground almost simultaneously.

Introduction to the law of free fall.

When an object is subjected to gravity, the process of falling from rest is free fall. Ancient Greek scholars believed that the speed at which objects fall was determined by their weight, and that the heavier the object, the faster it fell.

Aristotle, an ancient Greek philosopher who lived in the 4th century BC, was the first to elaborate this view, arguing that the speed at which objects fall is absolutely proportional to their weight. Aristotle's assertions were so far-reaching that for nearly 2,000 years that followed, people believed in his doctrine and never doubted it.

It was not until 1590 that Galileo Galilei did an experiment on the Leaning Tower of Pisa where "two iron balls landed at the same time", and came to the conclusion that two iron balls of different weights fell at the same time, thus overturning Aristotto's theory that "the speed of falling of an object is proportional to its weight", and correcting this erroneous conclusion that lasted for more than 1,900 years.

The law of motion of the free fall: vt = is the acceleration of gravity, on the earth g. Regularity of velocity over time:

v=gt。The law of displacement with time: h=(1 2)gt.

The variation of velocity with displacement: 2gs=v.

What are the rules of free-fall attack on the bodyDisplacement formula] h=(1 2)gt

The ratio of displacements in the first t seconds is: 1 : 2 : 3 : 4 : ....1：4：9：16：25：……

Regularity: Proportional sequences.

The ratio of displacements in the t seconds is: 1:3:5:7:9:......Regularity: Difference series.

Ratio of velocity] v=gt

The ratio of velocity at the end of the first t second: 1:2:3:4:5:6:7:......Regularity: Forming a natural number series and accelerating the motion evenly.

The ratio of the incremental speed of hail is 1:1:1:1:1:1:1:1:......Regularity: Uniform acceleration of movement.

Average velocity v=(vat + v) 2=vv 2

The ratio of the average velocity of the first t seconds: 1:2:3:4:5:6:7:......Regularity: Forming a natural number series and accelerating the motion evenly.

Ratio of average velocity in t-second:

Regularity: Forming a series of equal differences, the motion is uniformly accelerated.

The formula for deriving kinetic energy in free fallThis is because the distance at which an object falls in 1s is: times the acceleration in 1s (the average velocity of this distance) multiplied by time, and the kinetic energy of the object = the work done by the gravitational fall of the object = then deformed to the above formula: e kinetic energy = indicate g = a, a is the acceleration of the object) = the velocity of the object in free fall is time * acceleration) = .

An object that does not suffer from any resistance and only descends under the action of gravity is called "free fall".

Such as an object that begins to fall from a resting state under the gravitational pull of the earth. The sky above the Earth's surface can be seen as a constant gravitational field. Regardless of atmospheric resistance, the grinding free-fall motion in this region is a uniformly accelerated linear motion.

Although the gravitational force of the Earth is inversely proportional to the square of the distance from the object to the center of the Earth, the radius of the Earth is much larger than the distance traveled by the free fall, so the gravitational force can be regarded as constant near the ground, and the acceleration of the free fall is an invariant constant. It is a uniformly accelerated linear motion with zero muzzle velocity.

The characteristics of free-fall motion are embodied in the word "free", which means that the object is stationary when it begins to fall.

The law of free fall motion: vt2 = 2gh (g is the acceleration of gravity, on the earth g ; )

Free fall refers to the movement of a conventional object with zero initial velocity only under the action of gravity. Also known as free-fall movement. Free-fall motion is an ideal physical model.

free-fall) is the inertial trajectory of any object under the action of gravity, at least in the initial position, and only gravity is the only force, and it is a uniform acceleration motion with an initial velocity of 0. Since this definition does not specify the direction of the initial velocity, it also applies to the initial upward movement of the object.

Dust ballot weightlessness is produced by gravity outside the atmosphere due to the case of free fall, and sometimes any state of weightlessness due to inertial motion is called free fall.

This may also apply to weightlessness because the body is away from gravity. Although the definition of strict technical application does not include moving objects subject to other resistance, such as air resistance, in non-technical usage, there is no parachute or lifting device deployed through the atmosphere, also commonly referred to as a free-fall.

Resistance in this case, prevents them from producing a state of complete weightlessness, thus creating a feeling that the weight of the body is supported in an air cushion after the "free fall" of the parachute after reaching the terminal speed.

The motion of free fall is derived from gravity, and the motion of an object falling from a relative rest under the action of gravity alone is called free fall motion (its initial velocity is vo = 0m s), such as the physical phenomenon that occurs after holding an object with your hand and opening it easily under ideal conditions without applying any external force.