Recent content by daphnelee-mh

The correct answer is 5.6m, not sure where I made the mistake.

Yes, this is a homework problem, I know how to solve it if don't use virtual work method, but now I only can find the Yc

Summary:: Require to determine the designated forces using principle of virtual work ( unit force method ) I have no idea how to determine the multispan beam using virtual work, if I start to analyse the subsidiary portion BC member, the Yc can be calculated and following by the Ma... it seems...

Sorry I don’t understand

Summary:: The question requires us to determine the axial forces using method of sections but it is statically indetermine structure Can I make up one more equation by summing the moment at point O ?

Summary:: The question requires us to determine the member forces using method of joints but I couldn’t figure out how to calculate the support reaction forces I tried to use equilibrium equations to solve the question but the force applied will be canceled out, and eventually the reaction...

Snell's law: I am confused why sometimes the e-ray is below and sometimes above the o-ray? how if no>ne and how to

I am confused why positive value of bending moment is plotted under the axis?

but also the Tension of AB and BC will not longer the same right? I saw another explanation that the Tension BC is assumed as 0 since the cable slacks so the W will have a clockwise moment which cause it to return equilibrium

Is this what you mean?

Not sure whether I misunderstood your meaning how can I use the formula to prove it ?

centre directly below the pulley?

I found v=11.12 ft/s after using g=32.2ft/s^2, but isn't this is the initial velocity required to pass the basket? Seems didn't prove it will pass the basket or not.

How you got V=8.25m/s

Sorry for my misunderstanding, but I did correct my answer using the moment balance after your comment before. Thanks for you advise :)