Why is flat throwing a uniform acceleration motion in physics?

To solve this problem, we are better off applying Newton's second law.

According to Newton's second law, the resultant external force experienced by an object provides the acceleration of the object's motion. Since the object is in a flat throwing motion, the resultant external force of the object is the gravitational force experienced by the object. The direction is straight down, and the laying remains the same.

It is obtained by f=ma, f=mg, a=g, the size is unchanged, and the direction is vertical downward.

Thus, the object in flat throwing motion does a uniform acceleration motion.

Uniform acceleration is true, uniform speed is unspectra, uniform acceleration means that the acceleration remains unchanged! It must be noted that as long as the direction of acceleration remains unchanged, it is a uniform acceleration motion, which is divided into uniform acceleration linear motion and uniform acceleration curve motion

"Uniform acceleration motion" refers to the motion with constant acceleration, and the flat throw is only subject to gravity, and the acceleration is unchanged. So it's a uniform acceleration (personal opinion).

The object is only affected by gravity and the acceleration is constant in the whole parabolic motion can be divided into free fall motion on the vertical and uniform linear motion at the horizontal level According to the definition (the motion of acceleration with the same direction of the size of the object is a uniform acceleration motion) can be judged to be true.

Some people said earlier that it was a uniform speed change, which was also wrong.

It's not uniform acceleration, it's uniform speed. Because the direction of speed is changing, trust me! There is initial velocity in the horizontal direction, variable velocity in the downward direction, and the direction of the combined velocity is changing!

The resultant external force is not changed (only by gravity).

Then the acceleration is g and is constant.

So it's a uniform acceleration movement.

The acceleration is g and is constant.

So it's a uniform acceleration movement.

You will know it by analyzing the force, only by gravity, constant, in line with the definition of uniform acceleration.

The velocity in the horizontal direction is constant.

In the vertical direction, the movement is accelerated evenly due to gravity.

The combined velocity is also a uniform acceleration.

Why can't I understand the title? ~~

The flat throwing motion is a uniform speed movement. In the horizontal direction, the flat throwing motion is a uniform motion; In the vertical direction of the wax slide, the flat throwing motion is a uniform acceleration motion with zero initial velocity. Therefore, the net velocity of the flat throwing motion is constantly increasing, that is, the uniform acceleration motion.

A flat throwing motion object is thrown in the horizontal direction with a certain initial velocity, and if the object is only affected by gravity, such motion is called flat throwing motion. The flat throwing motion can be regarded as the combined motion of a uniform linear motion in the horizontal direction and a free-fall wax motion in the vertical direction.

The object in flat throwing motion, because the resultant external force is constant force, so the flat throwing motion is a uniform speed curve motion, and the trajectory of the flat throwing object is a parabola. The flat throwing motion is a curvilinear motion, and the time of the flat throwing motion is only related to the vertical height of the throwing point; The horizontal displacement of an object when it lands is related to time (vertical height) and horizontal initial velocity.

Flat throwing motion is divided into motion 1, the object is not subject to external force in the horizontal direction, and due to inertia, it does a uniform linear motion with constant initial velocity.

2. The object is in free fall when the initial velocity of the object is zero in the vertical direction and is only affected by gravity.

The flat throwing motion is a uniform velocity motion rather than a uniform variable velocity linear motion because the trajectory of the flat throwing motion is a curvilinear one.

The basis for judging whether the motion of an object is a uniform velocity motion is, 1Analyze the force on the object, if the force on the object is constant, then the motion is uniform velocity; 2.The acceleration of the motion of the object is analyzed, and if the acceleration is constant, the motion is a uniform motion.

In the flat throwing motion, the force on the object is the gravitational force (constant), and the acceleration is the gravitational acceleration g (constant), so the flat throwing movement is a uniform speed motion.

(2) The flat throwing motion is a synthesis of two kinds of motion:

One is a uniform linear motion in the horizontal direction.

The second is the free fall motion in the vertical direction, the uniform acceleration linear motion with zero initial velocity is the object in the flat throwing motion is only subject to gravity, and the acceleration is constant, and it is a uniform variable speed curve motion.

Yes, because the whole process of motion is only subject to gravity, the force is unchanged, and the acceleration according to Newton's second law is also unchanged, so it is a constant speed curve motion, of course, a uniform variable speed motion, teaching physics me.

No, the flat tossing motion is a variable speed motion because of it, the acceleration does not change, but the direction of its velocity changes with the motion.

As long as the acceleration is constant, it is a uniform speed motion, regardless of whether it is a straight or curved motion.

In other words, there is only one sufficient and necessary condition for the movement of a uniform velocity: its acceleration is constant, or its external force is constant.

Your question: The so-called flat throwing motion means that the object is only subjected to constant gravity, so it has a constant vertical downward acceleration, therefore, the flat throwing motion must be a uniform velocity motion. Got it?

The object that is doing flat throwing motion is subjected to constant gravity, and its acceleration is also constant, so the flat throwing motion is a uniform variable speed curve motion.

is a uniform velocity because the acceleration is constant and is g, but not in a straight line.

The flat throwing motion is a curved motion with a uniform variable speed.

Accelerated motion is divided into:

1.Uniform acceleration motion: Motion with constant acceleration (direction, magnitude and invariance) 2

Variable acceleration motion: the moving object with acceleration change (direction or size change) does flat throwing motion, although the trajectory is a curve, but in the process it is only subjected to the action of constant gravity, the direction of gravity is vertical downward, has not changed, the gravity of the object is unchanged, so the flat throwing motion is a uniform variable speed motion.

The reason why the trajectory of an object is a curve is because the initial velocity and acceleration are not in the same straight line, and if they are in the same straight line, they are moving in a straight line with uniform velocity.

Added: Linear motion at uniform variable speed:

Uniform speed curve motion: parabolic motion.

Variable speed curve motion: Uniform circular motion (the direction of acceleration changes all the time).

High school physics studies the flat throwing motion of an object.

The flat tossing motion is a uniform acceleration motion!

The definition of uniform acceleration is that the increase in velocity per unit time is constant, which must be that the acceleration remains unchanged, on the contrary, as long as the acceleration remains unchanged, it must be a uniform acceleration motion!

The acceleration of the flat throwing motion is unchanged, so it is a uniform acceleration motion!

The direction of the combined velocity and the direction of acceleration of uniform acceleration are not necessarily the same!