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1d
comment Interaction of solid objects and change of trajectory
Also after the collision? Then really the force can be anything...
1d
comment Interaction of solid objects and change of trajectory
But you have two objects.
1d
comment Interaction of solid objects and change of trajectory
I don't understand your "M2 has one degree of freedom". Basically, you have 12 degrees of freedom, and some equations for linear and angular momentum. What you miss here is a description of the interaction force during collission.
2d
comment How to calculate the drag coefficient using terminal velocity?
Don't you mean $v^2$?
2d
comment Is duplication of nucleus, electron and proton (sub-atomic particles) possible?
Biological processes just rearrange atoms, they don't create new atoms. In other words, babys grow because they eat, that is their source of new atoms to rearrange.
Jul
29
comment From where comes the raindrop
I would be highly surprised if there is a universal answer. It would depend on the atmospheric conditions, which can be anything.
Jul
29
comment Vectors-a tricky problem
Please, do not repost your question if it is closed. physics.stackexchange.com/q/128536
Jul
28
comment Is this kids experiment a legitimate way to show that air has mass?
@Pkwssis Please repeat the essentials of the experiment in your post, as the link can die at some point, which makes your question pointless. We would like to avoid that.
Jul
27
comment How to find the final momenta of these objects?
@archipelagoS That is why you have two solutions. Which?
Jul
27
comment Why do we take the value of the constant in Coulomb's law as $\frac{1}{4\pi\varepsilon_0}$?
Please do not post answer with only a link, but try to explain what it is about, such that people understand it without following the link. Links may die over time.
Jul
27
comment How to find the final momenta of these objects?
You have to be more specific. Carefully work through the steps I mention. They are not obvious if you've never done this before. Exactly where do you get stuck?
Jul
27
comment How to find the final momenta of these objects?
@archipelagoS You have $v=v_1+v_2$ and $v^2=v_1^2+v_2$. Two equations. There are two unknowns, which? Which want do you want to solve for first (does not matter)? Then solve for the other. Note: There are two solutions, because one of the equations is quadratic. What does that mean physically?
Jul
27
comment On the coordinate independence of general relativity
This is not even a "link-only" answer, because there is no link...
Jul
27
comment The magnetic polarity of earth?
@ACuriousMind The homework close reason clearly states the "show some effort". I suppose this was community determined.
Jul
27
comment How to find the final momenta of these objects?
@JohnRennie Although your solution is the quickest and most obvious route, I also always let students derive it by writing down explicitly all the equation, such that they conclude themselves the CoM-frames can be very helpful.
Jul
27
comment How to find the final momenta of these objects?
@archipelagoS Both options 1 and 3 can be correct. 1=complete inelastic (sticking objects) and 3=completely elastic.
Jul
27
comment How to find the final momenta of these objects?
@archipelagoS You don't. It is weird to substitute an known ($v$) with an unknown. It is better to substitute $v_1=v-v_2$ and calculate from there without assumptions.
Jul
26
comment How to find the final momenta of these objects?
What did you try with conservation of momentum and energy?
Jul
26
comment Yang Mills theory and SU(N) groups
@Qmechanic Are you sure? Because here he seems to specifically asking for resources? Maybe that makes it off-topic, but I wouldn't consider it as a duplicate, especially since he already linked this question in his post.
Jul
26
comment Evolution and the arrow of time
This question appears to be off-topic because it is about evolution.