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What Momentum is?

Updated: 11/13/2021
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7y ago

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B. The product of a mass and velocity of a Object--Apexx

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Nelda Stiedemann

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2y ago
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8y ago

Momentum is the inertial energy of a body or object, generally a term that describes the energy stored in a moving mass. It takes into account the mass of an object (m), and its velocity (v). The formula for momentum(p) is:

p = mv

Related Information:

With this formula, we can calculate the momentum of a given object and find out how much energy it carries. This information might be useful in the design of barriers, to stop vehicles from crossing medians and running into oncoming traffic on freeways.

Examples:

If someone throws a ping pong ball, it carries a certain momentum (energy). If it hits a window. Generally, the window won't break. The momentum of the ball is low enough so that the energy the ball carries is insufficient to break the window. However, if that window is struck with a brick that is thrown with the same velocity, the window will almost certainly break. The mass of the brick is much greater than that of the ball, so it carries a lot more energy with it. It's momentum is a lot greater because its mass is so much greater.

Should a small fishing weight, that breaks off a line in a practice cast, strike that window, it may break the window. However, if that same mass of lead is a projectile that has just been shot out of a firearm, and hits that window, it's probably going to shatter the window and go inside and make a mess out of whatever is in its way. The velocity of that small mass of lead, is so high in the latter case, that the energy it has will be much greater than that of the cast sinker owing to its higher velocity.

There are some special considerations as regards quantum mechanics and a link is provided below for anyone interested in further investigation.

A Different Perspective:

Momentum can be thought of as the store of energy in a moving body. This energy can be put to work.

If two bodies have different masses but the same velocity then the heavier one will have more momentum.

If the two bodies are equal in mass but different in velocity then the faster one will have more momentum.

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Shawn Johnston

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3y ago
bro... i wanted the answer.
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Alex lieseil

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2y ago
B. The product of a mass and velocity of a Object--Apexx
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therealcindaa

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2y ago
if thats the case we couldve looked on google

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15y ago

The momentum of an object is the mass (in kilograms) multiplied by the velocity (in metres per second), assuming that the speed is well below the speed of light. It is measured in kilogram-metres per second (kg m-1). If you have two objects of the same mass, the one that is moving faster has more momentum than the other. If you have two objects travelling at the same speed, the heavier one has more momentum. You could also have a light fast-moving object and a heavy, slow-moving object, and they could have the same momentum as each other.

The momentum of any object is constant, unless an external force acts on it (as given by Newton's first law). If an external force does act on the object, then the magnitude of the force is proportional to the rate of change of the momentum (as given by Newton's second law). So if you push against a light object (applying a force), it will accelerate away from you at quite a high rate. However, if you apply the same force to a heavy object, it will accelerate away much more slowly.

In practice, you could push against a heavy table (for example) and it might not move at all. This is only because there is an external force (gravity) holding the legs against the floor, and the friction resists your pushing. If you did this in outer space (where external forces can be ignored), the table would accelerate away from you according to Newton's second law.

Conversely, an object with a non-zero momentum (i.e. an object that has some mass and which is moving) will exert a force if it hits something. This is because the moving object loses some or all of its momentum (i.e. it slows down or stops completely), and the rate at which it loses momentum is proportional to the force it exerts.

Imagine a mini and a freight train both travelling at the same speed - the train has more momentum, because it is heavier. Imagine they both hit a building - they will both slow down on impact, and assume they come to a stop in the same amount of time. The train lost more momentum over the same time, so the rate of change of momentum is higher for the train than for the mini. Thus the force exerted on the building by the train is higher, and does more damage.

Imagine a heavy freight train moving along with some speed, and hitting a fly that was moving in the opposite direction. The front of the train exerts a force on impact, which may be enough to crush the fly against the front of the train. So the train must have lost a little bit of momentum, but in practice you would not notice it.

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10y ago

Momentum refers to the the quantity of motion of a moving body, measured as a product of its mass and velocity.

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Related questions

What Does it Men To Momentum is Conserved?

When momentum is conserved, the initial momentum is equal to the final momentum.


How do you find magnitude of final momentum?

Use this formula:Final momentum = (initial momentum) + (change in momentum)


What is momentum define?

what is the definition for momentum


What does conversation of momentum mean?

Conservation of momentum means that momentum is a constant and the change of momentum or force is zero.


The product of mass and velocity?

It's momentum.


What is it called when momentum can be transferred but the total momentum does not change?

conservation of momentum


An example of momentum?

Momentum is motion. When a car is moving it is exhibiting momentum. A young professional getting promotions is experiencing momentum.


What is mean by consevation of momentum?

Conservation of momentum means the sum of Momentum is constant. Conservation of Momentum is the result of Conservation of Energy.


What is momentum relaxation time?

Momentum


Is mass inversely proportional to momentum?

Mass is proportional to momentum. Momentum is the product of mass and velocity. When mass increases, momentum increases.


How do you conserve momentum?

According to the law of conservation of momentum which states that in a closed system momentum before collision is equal to the momentum after collision.


If an object is thrown does it gain momentum or lose momentum?

It depends at what time in the throw your talking about. In the beginning it gains momentum, then in the middle it starts to lose momentum then in the end it loses all momentum.