安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- Conservation of angular momentum during collisions - Physics Forums
Now, if we consider a rigid rod AB, hinged at point A, initially at rest in the vertical position, that can rotate around a horizontal axis passing on A, and we shoot a small bullet at the other extreme B, with a velocity perpendicular to the rod AB, the linear momentum is not conserved, as there will be an impulsive force on A keeping the rod
- Conservation of Momentum: Falling object - Physics Forums
Its the total momentum of a closed system that is conserved Not the momentum of a particle In your case the particle has a force acting on it and as such the momentum changes There is no law of physics which states that the momentum of a particle is conserved The gravitational force changs the momentum of a ball in free-fall
- Conserved quantities under the Lorentz boost - Physics Forums
The following combination of observables is conserved: ##HR - Pc^2t## where ##H## is the energy, ##R## is the center-of-mass position, and ##P## is the momentum In other words, this means that the center of mass of any system moves with constant velocity along a straight line
- Conservation of momentum and apple falling - Physics Forums
The momentum of an apple falling to the ground is not conserved because the external force of gravity acts on it But the momentum is conserved in a larger system Explain? I am confused because gravity is the external force acting upward, so what's the force that is acting up on the apple
- How does a stop-start-stop car conserve momentum? - Physics Forums
3 As momentum is a conserved property So I am wondering where the momentum is conserved when A The car goes from say 0 to 60 mph from none to some p B The car goes from 60 to 0 mph from some to none p Does the car dial in momentum to itself through two drive wheels via the road attached to the planet ie from the planet
- Meaning of the word conserved in relativity - Physics Forums
The mass of an isolated system is conserved as a trivial consequence of energy-conservation (i e , energy is conserved for any frame, including the system's rest frame) If one goes with #3, then one must admit that there's a sense in which velocity is conserved, too (finally connecting things back to your post here, @PeroK) And if that sounds
- How momentum is conserved in an inelastic collision - Physics Forums
These interactions that lose energy to the surroundings will keep energy from being conserved in the system They also violate the concept of “no external forces” and can keep momentum from being conserved When we say momentum and energy are conserved we are claiming we have made all of the external interactions negligibly small
- Do phonons conserve momentum or not? - Physics Forums
Thus, the conservation of momentum is only conserved modulo the reciprocal vectors Thus, collisions between phonons in a crystal sometimes have a momentum added or subtracted by a reciprocal vector If the reciprocal vector is not zero, the collision places the phonon in a different branch
|
|
|