All Questions
Tagged with collision reference-frames
43
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Justifying that the gold nucleus is at rest in a Rutherford experiment
This is an example on the Rutherford Experiment from Young and Freedman's University Physics.
In the last paragraph of the solution the book states that it is valid to assume that the gold nucleus ...
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3
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Rotational mechanics in collision of a mass and a rod
Suppose a small particle of mass $m$ moving at a velocity $v$ collides with a rod at the end in a perpendicular direction to the rod. I am sure that the rod translated in the direction same as the ...
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Is the net force on centre of mass always equal to the external force applied on one block of a two block system connected by a spring?
I came across a question which says-
"Two blocks of equal mass m are connected by an unstretched spring and the system is kept at rest on a frictionless horizontal surface. A constant force F is ...
- 57
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2d elastic scattering with an impact parameter
Hello guys I have homework that has tasked me with connecting the effect of the scattering parameter to the energy transfer in a 2d elastic collision of two arbitrary spheres with one of them standing ...
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Choice of origin and change in angular momentum
I am now stuck on the impacts of choice of the coordinate system on the change in angular momentum and I would really appreciate it if someone can give me some help on this.
Consider the following ...
- 133
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Calculation of the four-momentum of the $Z$ boson in a $pp \to Z +$ jet hard process
This thread might be somewhat long. But I look forward to anyone helping me understand the following problem. Before that I will clarify how I understand and distinguish things such center of mass, ...
- 1,398
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3
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136
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Electron-positron annihilation in two inertial frames
I have a question about the electron-positron annihilation example worked out in Greiner's Classical Mechanics, vol. 1, p. 468 (English edition).
If we consider an electron-positron collision in the ...
- 23
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141
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Conservation of momentum and energy: what is considered to be the system?
In an inelastic collision where mechanical energy is not conserved, momentum is still conserved. Should the Earth or the ground be considered as part of the system in order to account for the ...
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Which physics is true based on different reference frames? [duplicate]
There is one movement action based on two different reference frames.
I’m moving to a fixed wall with velocity $v$ if we take the ground as a reference frame, and I hit the wall and stopped.
The ...
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70
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Angular momentum decomposition in COM frame when COM rotating
Here is the question. Now I want to understand the alternative method below to solve the angular momentum. Normally in a point we can decompose the angular momentum about the point into distance ...
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What is the formula for momentum in a lab reference frame?
When learning momentum in introductory physics, I was taught this formula: $m_1 v_{1i}+m_2 v_{2i}=m_1 v_{1f}+m_2 v_{2f}$.
However, my new calculus-based textbook states advises to use the formula $v_{...
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What is the minimum energy of a photon for the reaction to occur?
If a photon with sufficient energy interacts with a stationary proton, the reaction occurs
$$\gamma+p\to p+\pi^0$$
What is the minimum energy of a photon $E_\textrm{min}$ for this reaction to occur.
I'...
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41
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Best place to shoot an object to topple it
Imagine a carnival game, the ones where you have to shoot down items with a toy gun, my question is where to shoot the item to maximize the rotational moment of the item. My studies lead me to believe ...
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Can the parallel axis theorem be applied to find the moment of inertia about a new center of mass?
Consider a particle of mass m that collides and sticks to a rod of mass M hanging from a pivot at some distance d from the center of mass of the rod. The result of such a collision would alter the ...
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Angular momentum conservation in collisions about point of impact
We use the idea that if a body collides with something, its angular momentum is conserved concerning the point of impact. Source
It is clear to me that all impulsive forces and the colliding bodies' ...
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