Recent content by Soumalya

Yes my intention is to replace the member BF with the two equal,opposite and collinear forces at B and F such that the magnitudes of the forces are known.In that case they are not unknown quantities. Assuming that we know the magnitudes of the applied forces at B and F and the member BF is not...

Oh yes! I missed that completely :headbang: But I have a new alteration of the truss after making a few adjustments to it which is troubling me again.What if the truss was like the one in the figure below and we wished to calculate all the member forces? What I did is replace the member BF...

Homework Statement The signboard truss is designed to support a horizontal wind load of 800 lb. If the resultant of this load passes through point C, calculate the forces in members BG and BF. [/B]Homework Equations For a solution using the method of sections for plane trusses,any three...

I solved the problem treating the reel and the stand as separate rigid bodies.:smile:

Is there absolutely no way of determining the normal reactions at A,B and C with the help of some simplifying assumptions? My textbook has got answers to them as NA = 108.6N, NB = 32.4N and NC = 58.1N

Assuming that the reel is mounted on a frictionless bearing attached to the stand so that no torque is exchanged between the reel and the stand a moment equlibrium equation about the axis of the reel gives, 100(cos15°).0.15=P(0.3) ⇒P=48.3N (which is close to the given answer of P=50N) But the...

Homework Statement The portable reel is used to wind up and store an air hose. The tension in the hose is 100 N and a vertical 200-N force is applied to the handle in order to steady the reel frame. Determine the minimum force P which must be applied perpendicular to the handle DE and the...

I had a thought about this approach earlier when a couple of things pushed me into doubts.Firstly,if we treat the two plates hinged together separately as two different bodies should we consider the effect of the centre cable on both the plates? Secondly,if instead of being hinged together...

Homework Statement The two uniform rectangular plates each weighing 800 kg are freely hinged about their common edge and suspended by the central cable and four symmetrical corner cables. Calculate the tension T in each of the corner cables and the tension T0 in the center cable. All...

I was being stupid here.That was a relatively simple task! You are so helpful Sir haruspex:smile: :dademyday:

Considering that there are only three forces acting on the pipe in equilibrium namely P,NA and NB and the three forces do not form a parallel force system,the lines of action of the three forces must be concurrent.Since the directions of both P and NA are fixed and can be perceived clearly the...

It seems I am definitely wrong somewhere because according to my assumption the pipe is a three force member(the three forces are not parallel to each other)under equilibrium and the lines of action of the three forces must have been concurrent.Either or both the assumed lines of action of the...

Noting your hints carefully I realized that the frictional forces FA and FB by the pulleys A and B respectively on the pipe as previously assumed cannot exist.Then we must have only two normal reactive forces NA and NB on the pipe by pulleys A and B respectively.The lines of action of these...

Since it is asked to determine the reactions at the bearings of the pulleys I assume the entire pipe length as shown in the figure(including the portion of the pipe between the pulleys and at the the point of application of force P)should be included in a free body diagram, so that we may be...

Homework Statement .The pipe bender consists of two grooved pulleys mounted and free to turn on a fixed frame. The pipe is bent into the shape shown by a force P=300N.Calculate the forces supported by the bearings of the pulleys.[/B] Homework Equations The force equilibrium equations in two...