How do you distinguish between these physical speeds and what are their characteristics?

Uniform acceleration – the speed becomes uniformly faster, such as an apple falling from the air to the ground – and the acceleration is constant.

Uniform deceleration motion – the speed is uniformly reduced, such as during braking – the acceleration is constant.

Uniform linear motion - the velocity is constant, moving in a straight line, such as a train on a straight track at a constant speed - occurs when there is a balanced force or no force, and the acceleration is zero.

Uniform acceleration motion --- the speed gradually becomes faster, and acceleration is a fixed value.

The speed of the uniform deceleration movement --- gradually slows down, and the acceleration eleven brother is fixed.

Uniform linear motion --- velocity is a fixed value and acceleration is 0

1 The acceleration of a uniform acceleration motion is a positive acceleration, that is, a motion in which the velocity (magnitude of the velocity) increases.

2 The acceleration of the uniform deceleration motion is negative acceleration, which is the motion in which the velocity will decrease.

3. The acceleration of uniform linear motion is 0, the velocity is unchanged, and the trajectory of the object is a straight line.

Similarities: the direction of velocity is constant, and the magnitude of acceleration is constant.

Difference: Uniform acceleration motion In the direction of acceleration, the velocity of the object gradually increases, in other words. Uniform deceleration motion is a gradual decrease in the rate in the opposite direction of the acceleration direction, and finally a uniform linear motion with 0 acceleration and no change in rate.

Suppose t t is the time, s is the distance, and v is the speed. According to the relationship between speed, time and distance, it is obtained:

The alphabetical formula for finding the distance is: s=vt;

The alphabetical formula for finding velocity is: v=s t;

The formula for finding the time letter is: t=s v.

In physics, velocity is used to express the speed and direction of an object's motion. In the simplest uniform linear motion, the magnitude of the velocity is equal to the distance traveled per unit of time. The common units of speed are: centimeter seconds, meter seconds, kilometers and hours.

Knowledge tips

1. Physical velocity is a relative quantity, that is, the magnitude of the change in the displacement of one object relative to another object (reference) in unit time.

2. Physically, there is also the average velocity: the ratio of the displacement of the object through a period of time to the time taken is the average velocity of the object in that displacement, and it is usually said that it is instantaneous velocity.

3. Speed is usually used to describe the speed or how much of a certain action is done per unit of time. For example: typing speed, translation speed.

4. Speed can only be described by size, and it is inaccurate to describe it by speed and slowness. For example: high speed, low speed.

5. Velocity is a vector, whether it is an average velocity or an instantaneous velocity. The only criterion for distinguishing velocity from velocity is that velocity has magnitude and direction, and velocity has magnitude and no direction.

The above content refers to Encyclopedia - Speed.

Speed is what is learned in the fourth grade of elementary school.

In physics, velocity is used to express the speed and direction of an object's motion. The velocity is numerically equal to the ratio of the displacement of the object's motion to the time it takes for that displacement to occur. The formula for calculating velocity is v=δx δt.

The unit of velocity in the SI system of units is meters per second. Velocity is a vector that represents how fast or slow a point of motion is moving and the direction of motion at a given moment.

Introduction to Speed:

Velocity is often used to indicate how fast or slow an object is moving. Numerically, the velocity is equal to the distance traveled per unit of time, and is calculated by the formula v=δx δt. The common units of speed are meter seconds (m s) and kilometer hours (km h), where meter seconds (m s) is the basic unit in the International System of Units.

Velocity is vector.

The definition in junior high school physics textbooks is: the amount of distance an object travels per unit of time. High school is defined as:

The velocity is equal to the ratio of the displacement to the time taken for the displacement to occur. Definition of University Physics: Velocity is a physical quantity that describes the speed and direction of the motion of a particle, which is equal to the differential of displacement to time.

Velocity is often used to indicate how fast or slow an object is moving. Numerically, velocity is equal to the distance traveled per unit of time. The common units of velocity are m s and km h, where m s is the basic unit in the International System of Units.

Velocity is vector. The definition in the physics textbooks of junior high school in China is: the distance traveled by the beam object in a unit time. High school is defined as: velocity equal to the ratio of the displacement to the time taken for the displacement to occur. Speed is often denoted by the symbol v.

Physical significance: It indicates the speed of the movement of the object, that is, the (mechanical) motion state of the object. Definition: The ratio of the displacement traveled per unit of time to time. The formula for calculating velocity is v=δs δt. The unit of velocity in the SI system of units is meters per second.

Definition of speed in junior high school: The ratio of distance to time is called speed.

Definition of high school: velocity is equal to the ratio of the displacement to the time it takes for the displacement to occur.

Symbol: v [Note: Greek letters indicate another physical quantity "displacement"] Definition: v=s t.

In the International System of Units, the base unit: meter second (m s) Nature: vector.

In the International System of Units, the dimension of velocity is lt (-1) and the basic unit is meters per second with the symbol m s.

Maximum: vacuum speed of light c = 299792458m s.

The velocity of a moving object at a certain moment (or position) is called instantaneous velocity.

The velocity has no direction, only magnitude, and is the ratio of the distance s traveled by the moving object to the time t taken to pass this distance.

Velocity has magnitude and direction, and it is the ratio of the displacement s s traveled by the moving object to the time t taken to pass this distance.

For a popular analogy, a person ran around the playground for 400m and took 100s... Rate = 400 100 = 4m s Speed = 0 100 = 0, because a circle indicates that the person starts from the starting point and eventually returns to the starting point, so the displacement is 0, so the velocity is 0; But the distance is 400m, so the speed is 4ms.

The difference is huge.

Velocity is a vector quantity and velocity is a scalar quantity. For example, if you walk to school, you walk a distance, and the speed of your walk is the time you walk, but the shortest distance from your home to school is much shorter than the distance you walk, and it is the speed compared to the time. Saying that you're coming back from home to school, your displacement is 0, right, then your velocity is 0.

This is where vectors come in. Velocity is a scalar quantity, how fast or slow an object moves in a certain direction, and velocity is a vector quantity. There is no direction. It's just fast and slow.

To put it simply, velocity has magnitude and direction, and velocity is the modulus of velocity.

Velocity is the ratio of displacement to time is a vector and velocity is the ratio of distance and time is a scalar quantity.

Velocity is a vector and velocity is a scalar.

The general speed is in the direction.

There is no such thing as a velocity, just a numeric value.

The physical meaning of velocity: Velocity is a physical quantity that describes the speed and direction of the motion of a particle, equal to the ratio of the displacement to the time it takes for the displacement to occur. In uniform linear motion, the distance traveled by an object per unit of time is called velocity.

The ratio of the velocity --- displacement to time of a particle per unit of time.

The magnitude of the velocity --- velocity.

Acceleration --- the ratio of the change in velocity to time. a=(δv)/(δt)

Average velocity --- displacement to time ratio. v=(δx)/(δt)

Instantaneous velocity ---velocity at a certain location" or "at a certain moment".

The ratio of the average speed --- distance to time.

Instantaneous rate ---instantaneous velocity".

x is the displacement, which is the "coordinate difference". δx=x2-x1.

x is the position, which is represented by "coordinates".

t is the time, which is the time difference. δt=t2-t1t is the moment.

Addendum: The direction of motion is the direction of speed, the magnitude of velocity indicates the speed of movement, and the direction of velocity indicates the direction of motion.

The average velocity, which is the ratio of the Total Displacement to the Total Time. where total displacement is the "vector" sum of all displacements of the object.

If you accelerate first and then decelerate at a constant speed, the total displacement is the sum of the three displacements.

For another example, if an object is thrown upwards and returns to the starting point after a period of time, the total displacement is zero, and the average velocity is zero. is a physical quantity that describes how fast or slow an object is moving.

This variable for displacement per unit of time. There is both size and direction.

University: Velocity is the limit of the amount of displacement change when the amount of time change approaches 0.

Numerically equal to the first derivative of the position vector versus time.

Displacement or distance per unit of time.

Indicates how fast or slow the object is moving!