Is a flat toss motion a uniform acceleration motion and why it is or is not Give an example

Uniform acceleration motion refers to motion with constant acceleration.

Uniform acceleration linear motion refers to the motion in which the acceleration is constant and the trajectory of motion is a straight line.

In this way, a uniformly accelerated linear motion belongs to a uniformly accelerated motion. Uniform acceleration motion includes not only uniform acceleration linear motion, but also uniform acceleration curved motion.

As long as the acceleration remains the same during the motion of the object (i.e., the resultant force is constant), the object moves at a uniform acceleration.

Then, flat throwing, oblique throwing, downward throwing, and free fall motion all belong to uniform acceleration motion.

If it is specifically pointed out that it is a linear motion with uniform acceleration, it is necessary to see if the direction of velocity and acceleration are the same.

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!

Flat tossing is the combination of 2 motion processes.

The uniform linear motion of the x-axis, i.e., the initial velocity of the object.

The y-axis is in free fall, you should know what kind of motion it is.

For the flat throwing movement, it is necessary to analyze from these two points.

As for asking if it is a uniform acceleration, do you think his acceleration has changed? It's always g, the direction is down, and the direction of his speed is down, and the second problem can be solved if you think clearly.

Surely it must be sprinkled. The so-called uniform acceleration motion refers to the motion with constant acceleration (the magnitude and direction of acceleration are unchanged), and has nothing to do with the direction of motion and velocity and the direction of acceleration.

The acceleration of a flat running motion is the acceleration due to gravity (ignoring air resistance).

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.

Why is flat throwing a uniform acceleration motion--- because the magnitude and direction of the gravitational force applied to it are unchanged. (Excluding resistance).

Judge the "combined motion".

The horizontal is not subject to force, the vertical is only subject to gravity, and the combined motion is only subject to one gravity.

Break down the "gravity" in the direction of motion and the direction of vertical motion

tangent direction" of the finch burial force ft, changing the magnitude of the velocity.

Gradually increase the age and)

normal direction (perpendicular tangent square annihilator direction)" force fn, changing the direction of velocity (moment change).

a. The flat throwing motion is only subject to gravity, and the acceleration is g, which does not change, so the flat throwing motion is the motion with constant acceleration, so a is correct;

b. Uniform circular motion means that the direction of velocity always changes, so B is wrong;

c. The condition for the object to do curvilinear motion is that the resultant force and the velocity are not in the same straight line, and the resultant force is definitely not zero, so c is correct;

d. When the direction of acceleration and the direction of velocity are opposite, the object decelerates and moves, and although the acceleration increases, the velocity decreases, so D is correct

Therefore, ACD is chosen

If the object is thrown horizontally with a fixed initial velocity, if the object is only affected by gravity, such a motion is called a flat throwing motion.

The flat throwing motion can be regarded as the combined motion of the horizontal direction of the linear motion of the uniform Sun Plateau velocity and the vertical direction of the free fall motion.

The object in flat throwing motion, because the resultant external force is constant force (gravity) and the acceleration is g, so the flat throwing motion is a uniform variable speed motion, and the motion trajectory of the flat throwing object is a parabola, so the flat throwing motion is a uniform variable speed curve motion.

The flat throwing motion belongs to the accelerated motion, and the subdivision is the uniform acceleration motion.

The velocity in the horizontal direction of the horizontal throwing motion is constant, and the velocity in the vertical direction is subject to a constant force - gravity, so the acceleration is constant, so it is a uniform acceleration motion.

The flat throwing motion is actually a special case of oblique throwing motion, and the oblique throwing motion is also a uniform acceleration motion, because the flat throwing motion is the same as the speed in the horizontal direction, and the speed in the vertical direction is subject to a constant force - gravity, and the acceleration is constant, so the oblique throwing motion is also a uniform acceleration motion. (Like this, the velocity in one direction is constant, and the velocity perpendicular to this direction is uniformly accelerated, and the projectile motion is uniformly accelerated).

(evenly) accelerate the movement. Because the object that is doing a flat throwing motion is only subject to gravity (constant force), it is moving (evenly) accelerating.

Only by gravity is a uniform acceleration.