Recent content by Nesha

It is presure that is mesured on the "motor table" (i don' know how to say in english, maybe dyno table?).

Maybe, because there are relative and apsolute velocity? You are right that same points have same velocity Vp=Vp' but you have velocity from DE. I have no time in this moment to solve you this problem. I'll try later.

There are three methods of solving this type of problems, and all three are energetic methods (all of them are based on virtual work). I know them like: - II theorem of Castillan (not sure how to writte in english his name) - Maxwell-Mors integrals - Theorem of Vershchagin (not sure how to...

You must draw bending diagram (moment) of force for each "force".Then you can say that deflection of B is zero. The deflection of B is caculated like this: Area of moment diagram from outside force x height of diagram in place of centar of gravity in second diagramx1/EI. I-momentum of inertia...

Exactly that. Just calculate moments from left to right and say =0 (or from right to left). Sorry on bad english.

a=dv/dt=3*x^2 - 8*x+7 a(x=5m)=42 m/s^2

I don't know what is the problem with the image. I'm uploading it again. http://img217.imageshack.us/img217/8043/problem4ku6uo0.th.jpg

I think that I solved your problem. Look at the picture above:

Pe is output energy (measured on dyno table), and Hd*Gh is input energy (kJ/kg *kg/s=kW).You can find density for gasoline so you can find mass of fuel.

@Ulysees Your attempt to calculate the efficiency of engine is not correct in many ways. Efficiency is calculate trough this formula: E=Pe/Hd*Gh Pe-efective power (measured on dyno table) Hd~44000kJ/kg Gh-Mass flow rate of fuel to engine With your data I calculated E>1, and that is not...

Look at this. Your attempt was not good. I think that you can solve your problem now.

There are two types of pumps: *Centrifugal Pumps (Axial flow pumps, Radial flow pumps and combination off this two) *Positive displacement pumps You can use both types for the fountains.

All problems of that type can be solved using this "formulas" : \intcos^n(x)dx = 1/nsinxcos^n-1(x) +n-1/n \intsin^n-2(x)dx \intsin^n(x)dx = -1/nsin^n-1(x)cosx +n-1/n \intsin^n-2(x)dx

http://img301.imageshack.us/img301/2897/111tx4.th.png