wrobel's latest activity

And that is not all :) ##\vec F_{ab}## is parallel to a line that connects the points ##a## and ##b##

This is an offtop because I have formulated the subject of discussion: And yes if this "modern day Ramanujan" can not solve a problem...

We kick undergraduates out of the exams if they don't understand such things

I have always thought that an idea of causation is expressed by the Cauchy existence and uniqueness theorem being applied to the ma=F

I am sorry but I do not believe that a doctor can be confused by such a childish sophism

yes I see

Sure. The Second Newton is ##m\boldsymbol {\dot v}= \boldsymbol R.## Here ##\boldsymbol R =R\boldsymbol e_x## stands for the tension...

Once again: when we consider the mathematical pendulum we are not interested in whether the wire tightened or not. We consider an ideal...

No given (active) forces, no potential energy, just ideal constraints. Introduce a frame ##Oxyz##. The axis ##Oy## passes through the...

Actually we do not know how the centripetal force is directed. To understand that one must know the trajectory first.

The formulation is still bad. so we can find an acceleration of the cone’s centre of mass. Then how to use the non slippery condition?

it seems yes

For intuition it is convenient to consider the wrapping direction as it is shown at the picture and to assume that the string remains...

I do not understand such questions. There is a definition: Power=##W=(\boldsymbol F,\boldsymbol v)##. There is a theorem: $$\dot...