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The meaning of MOMENTUM is a property of a moving body that the body has by virtue of its mass and motion and that is equal to the product of the body's mass and velocity; broadly : a property of a moving body that determines the length of time required to bring it to rest when under the action of a constant force or moment.
- Overview
- Introduction to Momentum
- Frame of Reference
- What else should I know about momentum?
Review your understanding of momentum in this free article aligned to NGSS standards.
Both the mass and velocity of an object impact momentum. As a result, less massive objects can have more momentum than more massive objects (if the less massive object is moving faster), and slower objects can have more momentum than faster objects (if the slower object has more mass). For example, a parked car has less momentum than a flying mosquito and a bicycle moving at 20 mph has less momentum than a freight train moving at 1 mph .
Depending on the situation, we can consider the momentum of individual objects, or we can consider the total momentum of an entire system. The total momentum of a system is the vector sum of all the individual masses that comprise the system. So for a system that consists of two masses, m1 and m2 , with velocities v→1 and v→2 , we can write P→total=p→1+p→1 , where p→1=m1v→1 and p→2=m2v→2 .
Since v→ is a vector, momentum, p→ , is also a vector. As such, the frame of reference impacts how we determine velocity v→ , and thus momentum p→ . For example, the passenger inside a moving car will have a momentum of 0 with respect to the car, but their momentum is non-zero with respect to the ground.
In addition, for the chosen reference frame, the x -direction and the y -direction of the momentum for each object must be considered separately. For example, two objects with the same mass and speed moving in the same direction will have total momentum of 2mv . But if those objects were moving directly towards each other, they would have a total momentum of zero.
•Momenta of zero. If an object is moving, its momentum cannot be zero. However, this is not necessarily true for a system. Since momentum is a vector, the total momentum of a system can be zero if there are multiple masses. For instance, a system of two objects that have the same magnitude of momentum and are moving directly toward one another will have a total momentum of zero.
•Momentum can be represented by p→ or by P→ . You may sometimes see p→ for an individual mass and P→ for a system of masses.
Introduction to momentum. Momentum (P) is equal to mass (M) times velocity (v). But there are other ways to think about momentum! Force (F) is equal to the change in momentum (ΔP) over the change in time (Δt). And the change in momentum (ΔP) is also equal to the impulse (J).
- 9 min
- Sal Khan
- In an elastic collision (http://en.wikipedia.org/wiki/Elastic_collision) no Energy is lost because the total initial kinetic energy of center of ma...
- If there is no external force acting on a system, there is no change in momentum which in turn means that the initial momentum is equal to the fina...
- The main reason one cant apply "Work Energy Theorem (Kinetic Energy Conservation, as in this case)" on this problem, because some Kinetic Energy is...
- Yes. Their momentum (p) equals their energy (E) divided by the speed of light (c): p=E/c You can also express that in terms of the photons wavelent...
- Momentum is conserved so the total momentum before the collision is the same as after the collision so it can give you information about what the e...
- Momentum directly results in kinetic energy, but momentum itself is not energy. p = mv KE = 1/2mv^2 = p^2/(2m)
- Let's say (to make it easy) that the colliding objects have equal mass and equal speed. Note that equal speed does not mean equal velocity - the ob...
- momentum is simply mass multiplied by its velocity... impluse is the rate of change in momentum of a body..where the time taken is very small
Apr 27, 2024 · momentum, product of the mass of a particle and its velocity. Momentum is a vector quantity; i.e., it has both magnitude and direction. Isaac Newton’s second law of motion states that the time rate of change of momentum is equal to the force acting on the particle. See Newton’s laws of motion.
- The Editors of Encyclopaedia Britannica
The SI unit for momentum is kg m/s. Momentum is so important for understanding motion that it was called the quantity of motion by physicists such as Newton. Force influences momentum, and we can rearrange Newton’s second law of motion to show the relationship between force and momentum. Recall our study of Newton’s second law of motion (F ...
Momentum is a measurement of mass in motion: how much mass is in how much motion. It is usually given the symbol p . By definition, p = m ⋅ v. Where m is the mass and v is the velocity. The standard units for momentum are kg ⋅ m / s , and momentum is always a vector quantity.
