Recent content by torchflame

Homework Statement Given the following structure, determine the value of F such that the resultant couple moment on the structure is 200 pound-feet clockwise. I'm not looking for help here per se, just if this is a valid method of solution: Because the moment of a couple is a free vector...

Well, apparently the answer was v_0=1.16 \times 10^6 \frac{\mathrm{m}}{\mathrm{s}}, which I have absolutely no idea how they got. Anyone have any ideas?

Okay, so if I look at the collision from the perspective of conservation of momentum, and I say M is the mass of the sodium atom, I get that m_ev_0+0M=m_ev_{post e}+Mv_{post Na}. If I take the minimum energy, v_{poste}=0. That implies that the velocity of the sodium after the collision...

Homework Statement A sodium atom emits a photon with wavelength 818 nm shortly after being struck by an electron. What minimum speed did the electron have before the collision? Homework Equations E_{particle}\geq\Delta E_{atom} The Attempt at a Solution For the minimum energy...