What happens on planets with very little or very large acceleration in free fall?

It varies from latitude to latitude because the Earth is an irregular sphere and the closer it is to the equator, the farther it is from the center of the earth according to the gravitational force formula.

But the difference is very small and you can't feel it.

Day and night do not change.

Alternate to another planet.

For example, it is also jumping off a building.

If you have little gravity, you may not be able to fall to your death if you jump from the 5th floor.

But if you jump from a window on the first floor with a strong gravitational pull, you may fall to your death.

Isn't it an object on a planet with little gravitational acceleration, if you weigh it on a scale on the earth, its weight will be less than its own mass; Conversely, if the planet is large, the weight will be greater than its own mass.

The gravitational acceleration of the earth varies with latitude because the earth is not a sphere, the equator is wide and the poles are flattened, so the radius of the earth will be different, and according to the law of gravitation, the gravitational acceleration will also be different, and it cannot have anything to do with day and night.

1.Both the buoyancy and drag of the air in the experiment have an impact on the results. Air buoyancy is an upward force formed due to the difference in pressure of a liquid or gas that can reduce the true weight of an object.

In experiments, if the air buoyancy Hu Shanfeng is not taken into account, the mass of the object will be overestimated. Whereas, drag is the force generated by the collision of a moving object with air, which will cancel out the speed of the object's motion, resulting in a slowdown in the falling speed of the object's pants. Therefore, if drag is not taken into account during the experiment, the resulting gravitational acceleration value will be lower than the real value.

2.When measuring gravitational acceleration using the free-fall method, you first make the object to fall freely, and then calculate the gravitational acceleration by measuring the fall time. The principle of this method is to take advantage of the effect of gravitational acceleration on the vertical free fall of an object.

In free fall, ignoring the influence of external forces such as air resistance and buoyancy, the falling speed of the object will continue to increase, and its acceleration is the gravitational acceleration. In order to reduce the error, it is necessary to use a precise timer and take measures to prevent the object from other external interference during the experiment.

To put it simply: gravitational acceleration is related to the mass of the Earth and nothing else.

Drill down: Gravitational acceleration.

First, it is related to the factors of the earth, such as:

1. The position of the object on the ground.

For example, due to the rotation of the earth, gravity is a component of the earth's gravitational pull on an object, and another component is the centripetal force required to supply the object to rotate around the earth.

1) If the linear velocity of the object at the equator is large and the centripetal force required is large, the gravitational force will be small, and the gravitational acceleration will be small.

2) When going to the poles, the linear velocity of the object rotating with the earth becomes smaller, and the centripetal force required becomes smaller, and the gravitational force is divided, and the gravitational acceleration becomes larger.

3) When the pole is reached, the linear velocity of the object rotating with the earth is the smallest, and the centripetal force required is the smallest, then the gravitational force is the largest, and the gravitational acceleration is the largest.

2. The higher the height of the object from the ground, the smaller the gravitational acceleration, because gravity is a component of the gravitational force of the earth on the object, and the main component of this gravitational force is gravity, the magnitude of the gravitational force is inversely proportional to the square of the distance, the higher the object is from the ground, the greater the distance between the object and the center of the earth, the smaller the gravitational force, the smaller the gravitational force, so the smaller the acceleration;

3. If it is a deep hole in the ground, the deeper it is, the smaller the gravitational acceleration, and when the object is at the center of the earth, the gravitational acceleration is theoretically "0", which is obtained according to the principle of theoretical mechanics.

Second, it is related to the attraction of alien stars, such as the attraction of the sun and the moon to the earth, which reduces the gravitational force of the object and makes the gravitational acceleration smaller.

The speed of descent is only related to the initial velocity, altitude, and air resistance. The speed of descent changes quickly and slowly is related to air resistance.

The descent velocity is only related to the initial velocity, height, and air resistance, which in turn is related to the size and shape of the object, but it should be noted that it has nothing to do with the weight of the object.

The speed of the fall is related to the acceleration, ma=mg, a=g, the falling of the object is the acceleration is equal to g, independent of the mass, the exact acceleration calculation formula: ma=mg-f (resistance).

The motion of a conventional object with zero initial velocity only under the action of gravity is called free fall motion. Free-fall motion is an ideal physical model. (free-fall) is the inertial trajectory of any object under the action of gravity, at least initially, with only gravity as the only force, and it is a uniform acceleration motion with an initial velocity of 0.

Explanation: During the movement of free fall, it is mainly affected by gravity and air resistance, but the air resistance is far less than gravity, and the resultant force of the object is vertically downward, which will produce downward acceleration, so the speed is getting faster and faster.

Due to the effect of gravity, the object will be in free fall in the air, and the speed will increase more and more, and the speed will increase by about 10 meters per second every 1 second.

The object is subjected to gravity, and the gravitational force is greater than the downward resistance of the air, resulting in acceleration. The acceleration increases from zero, causing the velocity to change faster and faster.

According to the law of conservation of energy, when an object falls, the potential energy decreases and thus the kinetic energy increases, so the velocity is getting faster and faster. Of course, the premise is not affected by air resistance, but in general, air resistance is often ignored, so there is such a saying.

Escape velocity refers to the perpendicular ejection of an object from the surface of a star. If its initial velocity is less than the escape velocity of the star, the object will only rise for a short distance and then the acceleration caused by the star's gravity will eventually cause it to fall. If we can't reach Earth's escape velocity, will we leave Earth forever?

Why we can't reach the escape velocity and never be able to leave the Earth The escape velocity of the Earth refers to the 2nd cosmic velocity (kms), the 1st cosmic velocity (kms) orbiting the Earth, and the 3rd cosmic velocity (kms) leaving the solar system. Where do these speeds come from? Let's take a look at Newton's imagination.

Newton was not hit by an apple, but was playing with stones. We all know that the earth is a sphere, so if I put a stone on the surface of the earth, with the maximum force, the stone will continue to move, farther and farther away. Then, if we assume that the force of the rock is constantly increasing (that is, increasing the initial velocity of the rock when it is thrown), will the rock be pushed farther and farther until infinity?

Of course not, how could I possibly make it to positive infinity, the earth is a sphere and has a radius, so when you reach a certain speed, your rockfall arc is like the arc of the earth itself, so we have to look like a stone that seems to fly parallel to the ground from the god's point of view, without falling, which is the first cosmic velocity (kilometers and seconds), the minimum speed at which any spacecraft wants to fly around the earth. Then we increase the initial velocity of the rock, and at some point, the rock will fly away from the earth's surface at too fast without being trapped by the earth's gravity. This is the escape velocity of the Earth, or the second cosmic velocity of kilometers per second.

Low-velocity space from above the course we can again clearly see what is the escape velocity of the Earth? You give it an initial velocity and then ignore its velocity. That's the point, it's not that I can't leave the Earth below this escape velocity, but if I am below this escape velocity, it can't leave the Earth by inertia without any other momentum.

Suppose we have a spaceship standing upright on the ground and we launch it directly to the ground at a turtle speed of one meter per second, will it eventually leave the Earth?

Yes, although the gravitational pull of the earth is relatively large, the speed of the aircraft is relatively fast, and if it continues to accelerate, it may get rid of the attraction after exceeding the corresponding standard, and the speed will exceed kilometers per second.

It should not be able to break away from the earth's gravity, because the earth has a gravitational force, and although it flies like the earth, it will still be attracted by the earth, so it is impossible to break away from the earth's gravity.

No, you cannot. Because the gravitational pull of the earth cannot disappear, even if you use a flying machine, it is impossible to get rid of the gravitational pull of the earth, as long as it is on the earth, it will be affected by gravity.

The reasons why gravity does not affect the magnitude of acceleration when an object is in free fall are as follows:

According to Newton's second law: the magnitude of the acceleration of an object is proportional to the force, inversely proportional to the mass of the object, and proportional to the reciprocal of the mass of the object; The direction of acceleration is the same as that of the applied force.

The formula is: f=ma, f is the force on the object, m is the mass of the object, and a is the acceleration.

In free fall, the gravitational force g is the force exerted on the object (in the case of negligible air resistance), g = mg, m is the mass of the object, and g is the acceleration due to gravity.

Therefore, mg = ma and therefore acceleration a = acceleration g due to gravity, independent of the gravitational force of the object.

But all of the above is done in an ideal state where there is no resistance.

But the gravitational force of an object does not affect the magnitude of the acceleration? The gravitational force should be changed to weight or mass, i.e. the original question: "- But the weight of the object does not affect the magnitude of the acceleration?"

Because the mass of the object is compared with the mass of the earth, the mass of the object is less than the mass of the earth, and a drop of water in the sea is less than the mass of the earth, that is, a drop or a few drops of water compared with the sea is only the sea, and the mass of the object is only the gravitational force of the earth itself, that is, the mass of the object is no matter how large or small the earth is. The gravitational force generated by the object is the gravitational force of the earth, and the gravitational force of the mass of the object is equal to 0, so the weight of the object does not affect the acceleration of things.

According to the law of gravitation, the gravitational acceleration of objects is the same.