masses Definition and 9 Threads

[Mentors’ note: No template because this post was moved from the technical forums. Everything that the template asks for seems to be present in the body of the post] Suppose there is a spring-mass system arranged as shown in my crude drawing. This occurs on a frictionless surface. The spring...

A conducts an experiment. I don't know how to describe this experiment, but let's say he measures the masses of ##3## things and computes their sum. He finds that the mean mass equals ##2## units of mass. He considers this to be special in some sort of way, something that demands an explanation...

Hi. The following situation: The pulleys are fixed to the floor/ceiling and massless, as are the ropes, and there is no friction. At ##t=0##, the masses are released from rest. For the moment, I'll assume ##m_2\gg m_1##. So ##m_2## will accelerate at ##g## and the red rope at...

In GR, if two massive objects distort spacetime, are the effects still "equal and opposite" in some sense? In what sense? It seems that for "equal" to hold, the equations of GR must force the effect of one mass, A, on spacetime at the location of another mass, B, to equal the converse (the...

##\vec{\rho_{D1,i}}+\vec{\rho_{D2,i}}+\vec{\rho_{D3,i}}+\vec{\rho_{R,i}} = \vec{\rho_{D1,f}} +\vec{\rho_{D2,f}} +\vec{\rho_{D3,f}} +\vec{\rho_{R,f}}## ##\vec{0} = \vec{\rho_{D1,f}} +\vec{\rho_{D2,f}} +\vec{\rho_{D3,f}} +\vec{\rho_{R,f}}## ##\vec{0} = m_D(15\hat{i} + 5\hat{j}) + m_D(-12\hat{i} +...

This is a the representation of the two masses. . Using Newton's second law I got the following equations assuming x1>>x2: m*x1''(t) = -k(x1-x2) m*x2''(t) = 0.5kx1-kx2 I put it in matrix form m| x1''| = | -k k| *|x1| |x2''| =| 0.5k -k| |x2| After some simplification assuming...

Hi, If i have a system that consists of 2 pullies and 3 masses, what is the tension on each part of the string? I know that for 2 masses hanging on either side of a pulley, the tension is the same. But for 3 masses, and 2 ideal pullies(no friction) and inextensible string, is tension the same...

Two masses, M1=4.0 Kg, and M2=20 Kg, are attached by a rope that crosses over a massless, frictionless pulley. M1 slides horizontally and experiences a kinetic frictional force due to its motion across the surface. The coefficient of kinetic friction is uk = 0.638. When solving the problem...

I have always wanted to ask this question, because there is something that I am missing. I think it should be conceivable that the speed of light is affected by masses, so that its value within the solar system would be different from its value in interstellar space and even more so in...