Is it true that momentum is a physical quantity that describes the state of motion of an object ? W

That's right. Momentum is a physical quantity in dynamics that describes the state of motion of an object. The state of motion refers to how the position of an object in motion changes. Of course, it depends on the momentum, and the mass does not change, which also depends on the velocity of the object.

The so-called state parameters refer to the fact that under certain conditions, the material system is in a certain state, and each state needs to be characterized by a set of physical quantities, which are called "state parameters". A state is the state in which a physical system is located. The state of the system is characterized by state parameters.

Of course, state parameters do not necessarily describe the state of motion.

Tung Tsai's second sentence is correct. That is, momentum is a physical quantity in dynamics that describes the state of motion of an object.

You have to keep in mind, though, that this is in kinetics. In kinematics, velocity replaces momentum, i.e., the physical quantity that describes the state of motion of an object. So the one on the first floor is also right.

In general, momentum is a physical quantity that describes the state of motion of an object in dynamics, and the reason is that only velocity cannot calculate the time it takes for an object to stop, so the momentum point solution is related to impulse. And in kinematics, you only need to know the velocity and acceleration to ** the trajectory of motion. That's the difference between dynamics and kinematics, and I think it's a difference in terms of research.

I have a deep understanding of physics. It's just a high school student, and I hope the landlord will think it through. Sometimes, we need to think.

Hee-hee.

No, the correct expression should be: velocity is a physical quantity that describes the state of motion of an object.

Whereas, momentum is a physical quantity that describes the motion properties of an object.

Momentum is a physical quantity that describes the mass and state of motion of an object.

Wrong. That's speed. Momentum refers to the product of the weight of an object versus its velocity.

Momentum is a physical quantity that measures the state of an object's movement and envy cover. （）

a.That's right. b.Mistake.

Correct answer to the case of the assault: a

Kinetic energy is a scalar e

k =1 2

mv2, momentum is the vector p=mv, the magnitude relationship between kinetic energy and momentum: ek = p2

2m, a, the momentum p of an object is constant, its kinetic energy ek must be constant, so a is correct b, the kinetic energy of an object is constant, its momentum must be constant, but the direction of velocity can change, that is, the direction of momentum can change so b is false

c. The momentum of two objects is equal, when the masses of two objects are equal, their kinetic energy must be equal, and when the masses of two objects are unequal, their kinetic energy must not be equal so c is false

d. When the kinetic energy of two objects is equal, and the mass is unequal, their momentum is also unequal, so D is wrong, so choose A

Momentum is a physical quantity that describes the mass and state of motion of an object. Acceleration is the ratio of the amount of change in velocity v to the time t it takes for this change to occur. That is, the rate of change of velocity versus time, which is numerically equal to the change in velocity per unit of time.

It describes how fast and slow the speed changes and the direction in which the speed changes. The magnitude of acceleration is determined by the magnitude of the velocity change and the amount of time it takes for the change to occur, and is not necessarily related to the velocity itself or the magnitude of the velocity change. A large acceleration indicates a rapid change in velocity, not a large velocity.

It also does not indicate that the speed changes greatly. In linear motion, the direction of initial velocity is usually positive. When a>0 indicates that an acceleration motion is being made, and when a<0 is a deceleration motion.

a=0 when moving at a constant speed.

Physics is an experimental science, and its values and units are measured and induced by quantitative relations; Therefore, the 'quantity' in physical quantities actually includes the numerical value and unit of measurement (measurement) and the relationship between several measured quantities;Like what; Displacement and time can be measured directly, while velocity, acceleration is expressed through displacement and time, i.e., displacement, time, velocity, acceleration are all physical quantities that are used to describe the motion of an object.

That's right. Momentum is a physical quantity in dynamics that describes the state of motion of an object. The state of motion refers to how the position of an object in motion changes. Of course, it depends on the momentum, and the mass does not change, which also depends on the velocity of the object.

The so-called state parameters refer to the fact that under certain conditions, the material system is in a certain state, and each state needs to be characterized by a set of physical quantities, which are called "state parameters". A state is the state in which a physical system is located. The state of the system is characterized by state parameters.

Of course, state parameters do not necessarily describe the state of motion.

Why is momentum a better way to describe the motion of an object than velocity?

In physics, momentum is a physical quantity related to the mass and velocity of an object. In classical mechanics, momentum (kg·m s in the International System of Units) is expressed as the product of the mass and velocity of an object. For a more precise measure of momentum, see the Modern Definitions of Momentum section of this page.

Generally speaking, the momentum of an object refers to the tendency of the object to remain in motion in the direction of its motion. Momentum is actually a corollary of the first law of the bull. Momentum is a conserved quantity, which is expressed as the sum of the open rents of momentum in a closed system is immutable.

Velocity is a physical quantity that describes the state of motion of an object. Acceleration is a physical quantity that describes how quickly an object's state of motion changes. Both velocity and acceleration are vector quantities.