Recent content by NeroBlade

Hi thanks for the heads up mech_engineer. I looked up the problem again and it turns out that its a cantilever beam with a force applied to the end of the beam. Hence for my analysis is the following: I = \frac{bh^{3}}{12} K = \frac{3EI}{L^{3}} M = \frac{F}{g} [itex]\omega =...

Sorry, I'm bit new to this area. OK just realized that cross sect area is corrected (thanks!) Indeed the beam is Steel, how did you work out the beams mass though 40000kg. Did you use the relation E = Stress/Strain where Strain = Disp/Orig Length Stress = Force/Area And the beams...

Hello Phys Forum I’m trying to solve a dynamic problem that involves a cantilever beam fixed onto a support that experiences a time history load on the free end of the beam as shown below: / / /--------------------------------[] / / Cross section Beam is rectangular beam with 1m width and...

Hi Do any of you guys know what equations or formulas I should be using for questions like "If A is on Earth and B is an Astronaut traveling near the speed of light". Calculate the duration of B's journey to A and the duration of B's journey according to B. I assume that B's time...

Hey folks I've been having trouble solving this assignment and I'm not sure whether my solutions is correct or in the right direction. The one question just need help doing the fraction rearranging to prove that the function is associative. 1. The Relativistic Law for adding velocities is v1...

The Kinetic Energy I worked out for the proton accelerated through 3 gaps with pd of 36kV is 108kEv which is 1.7 x 10^-14 J

1.##Attempt## KE by the relationship p^2 = 2m KE Use the above relationship to calculate the accelerating potential required for electrons to have a de Broglie wavelength of 4·5 × 10^(–11) m. \lambda = h/mv since p^2 = 2m KE \lambda^2 = h^2/(mv)^2 (mv)^2 = h^2 / \lambda^2 = 2m KE...

Hi I've been revising and came across some questions which I do not understand how they obtained the answer could you guys help? 1. Show that the momentum, p, of a particle of mass m is related to its kinetic energy, KE by the relationship p^2 = 2m KE Use the above relationship to...

Hey folks I been going through past exam papers and got 4 questions which are hard to follow, for those that know please provide a detailed step by step guide. I have completed most of the previous parts of each question which got me some extra values. ======= Question 1 OK here's what I...

Hi How can I work out which subset is a subspace and which one isn't on this problem: Fq ([0,1]) be vector space of all functions [0,1] -> Q with addition and scalar multiplication defined in usual way. Let U < Fq ([0,1]) be the subset consisting of all functions f s.t. f(0) >= f(1) and...