centimeter by centimeter?. well threre must be some other way, like its going to be triangular profile with one end E1 and other end E2.. is that possible to find equivalent E acting on rod ..
Homework Statement
see attachement
Homework Equations
dl= PL/AE
The Attempt at a Solution
as you see here my youngs modulus E varies linearly. i doubt that adding up E1 &E2 wld give solution.. any help?
Homework Statement
For (fi)= (b/6) x*y3 +C*xy show that simply supported beam of 2L loaded concentrated load at mid span.,the stress function satisfy loading condition is (fi) .treat concentrated load as shear stress suitably distributed to shoot this function. so that intergtal of limit (h to...
thanks Nas .. i got the solution...sinusoids having frequencies in integer multiple of (f) have net freq (f) when addded together..when i consider by t=1/f ..its pretty clear final net freq occur only after first signal ..so answer is P
yes sir but I dont hv known limits in Grapically ..only freq . so by trignometricaL relation i tried it( as u said) ..with sin A+sinB=(1/2)*sin((1/2)(A+b))*Cos((1/2)(A-B)). . i get in the form sin*cos+Sin(C)
AND no use of sin A*cosB.. how to proceed here
yes . take moment about A. consider moment contribution at C ...both X and Y.. u need vertical distance of load that act from base.. that would be 1 . so thats it
Homework Statement
three harmonic function of frequency p, 2p ,3p were added together. what is the frequency of resultant periodic function?
Homework Equations
X=Asin(wt)
A-amplitude w-frequency
X=X1+X2+X3
The Attempt at a Solution
need a hint ..
well .torsion for solid shaft , i have torsion eqn T/J=G*tete/L=shear stess/R
but i found finally its torsional stiffness k=T/twist that provide solution. if not i need to do some ground work myself .thanks chester
sorry. J represent torsional constant. its the resistance to torsion. im i correct ? ..or how can i use area here to calculate variation in resistance. bit confued :(
ok. i get that . so my area of solid shaft = .55*A(hollow ).. but resistance depends on polar moment of inertia right? .
j(solid)=pi/32(D)4 .if im not wrong .. then does my shaft resistance decreasce?.
Homework Statement
internal diameter of a hollow shaft is two third of its external diameter .if it is melted and new solid shaft is made.what would happen to the shaft resistance of torsion. in percentage?
Homework Equations
as i know T/j=G*angle of twist/length.
torsional...
Homework Statement
An a/c has an approach speed of45 m/s with descent angle of 7.1 deg. if the a/c load factor is 1.2 and constant deceleration at touch down is .25g (g=9.81).its total landing distance approx over a 15m high obstacle is
Homework Equations
R=v/g(n-1)
Sa=(h-hf)/tan( teta)...
use compressor efficiency=ideal/actual entalphy ,for given pr ratio , To1 and effiency ..find only unknown To2 and substitute& find Wc=Cp(To2-To1).
so from direct substitution in Wc=Wt . GivenTo3 turbine inlet temp. Find To4 ..Sub in Wt=change in delta To *Cp.
problem Is we have formula for specific impulse for earth standard..That Isp=Cj/Go
Cj-effective jet velocity
Go-gravity
..and thats the reason i asked..why its not mars gravity!!! Im not sure of it.
well. I have this question. That my rocket is launched from mar in an return mission to earth. To calculate specific impulse of the rocket. Should i consider mar or earth gravity and if why!? Help me with this