Recent content by einstor

from most post that I read above, so is the law of relativity does not work on irrelevant systems?

Suppose I have a stick whose length is infinite, then the stick was rotated at one end. Despite playing with a small angular velocity, but should have a linear speed of the other end of the stick (which is at infinite distance) will be very high considering the formula of linear velocity =...

I am still confused about this. say, we are in a constant moving truck, we pushed the back of the truck, so we provide the force F on the walls of the truck, towards the rear. but the truck moving with constant velocity and has traveled a distance of say x. we do the work according to an...

consider this, since r>R (radius of earth) r reducing causes magnitude of force increasing, but if r<R when r reduces so the total mass of the Earth included to attract reduces too, until r=0 we'll get the total mass of the Earth covered is 0, so the total force is 0 (analogy of Gauss Law in...