# Physics

posted by helpless

The small tapered bar BC has length L=0.1 m and is made of a homogeneous material with Young’s modulus E=10 GPa. The cross sectional area of the bar is slowly varying between A0=160 mm^2 (at B) and A0/2 (at C), as described by the function:

A(x)=A0/(1+(x/L))

The bar is fixed at B and a load P=8kN is applied at the free end C. Determine the total elongation, δ, of the bar. (in mm)

1. Mag

2. FLu

-0.71 mm
Problem 3) 184 MPA

Anyone for Problem 1 and 2 please?

3. Mag

Thanks FLu!

4. Ortum

Great thanks!

5. RORO

6. Anonymous

RORO, it worked for me, there must be tolerance, try -0.73 and let me know if it work?

Do you have problem 1 and 2?

7. FLu

Yes, must have something to do with tolerance RORO, try -0.73, there was technical issue before.

RORO did you get problem 1 and 2 please?

8. Saga

Anyone for problem 1&2?

9. RORO

Ok, thanks. No, I hav not solution for 1 and 2!

10. Nura

Anyone Problem 1 and 2 please?

11. mehwish

anybody have the solution of problem 1 and 2?

12. Any

13. Anonymous

Pretty please with sugar on top?

14. Flaminuous

15. Anonymous

I figured out the first answer, it was very simple, just had to multiplicate density(kg/m^2) x area(m^2) x gravity(m/s^2)= (kg m/s^2)= (N)

So:fx(x)=rho_1*g*A

I don't understand why f depends on x

16. FLu

Anonymous, tried it out but it says rho_1 not allowed in answer. How did you manage?

17. Saga

18. Hura

same problem!

19. Nyu

20. Anonymous

The first answer for the first exercise should be: rho_1*g*A

Try typing it, not copy/paste.

rho_1 isn't allowed for L/2 to L

21. FLu

Thanks Anonymous now it worked.
Have you had luck with Problem 2?

22. RORO

fx(x)=rho_2*g*A for L/2 to L

23. FLu

Thanks RORO, any luck with the second Problem set?

24. Mag

THanks guys, anybody managed other problem in 1 and 2?

25. mehwish

I cannot understand the solution of f(x)=rho_1*g*A plz give the two words of question as a hints

26. mehwish

I cannot understand the solution of f(x)=rho_1*g*A plz give the two words of question as a hints

27. Neon

28. F10

If you don't understand the solution then you have to read the exercises at least.

29. Neon

F10 is right. DO you have managed Problem 1 or 2 F10?

30. faryia

I read but I don't understand because some guys talking on one question and some guys talking on other question at the same time.

31. But

Anyone for Problem 1 and 2 please?

32. mono

A blade is fixed to a rigid rotor of radius R spinning at ω rad/sec around the vertical z-axis (see figure). Neglect the effects of gravity.

4.
5.Calculate the peak stress in the blade: σmaxn
7.Calculate the displacement of the blade mid-section: ux(L/2)
8.Given:
9.Young's modulus, E , mass density, ρ .
· Constant cross sectional area, A
· Angular velocity ω
(Hint: if you work in the non-inertial frame of the rotating blade, the d'Alembert force/unit volume is ρω2r along the +x direction)
1. Try it:
2. σmaxn=
3.
5.
6.
7.
8.
1.
2. Try it:
3. δ=
4.
6.
7.
8.
9.
1.
2. Try it:
3. ux(L/2)=
4.
6.
7.
8.

A blade is fixed to a rigid rotor of radius R spinning at ω rad/sec around the vertical z-axis (see figure). Neglect the effects of gravity.
Calculate the peak stress in the blade: σmaxn
Calculate the displacement of the blade mid-section: ux(L/2)
Given:
Young's modulus, E , mass density, ρ .
· Constant cross sectional area, A
· Angular velocity ω
(Hint: if you work in the non-inertial frame of the rotating blade, the d'Alembert force/unit volume is ρω2r along the +x direction)
plzzzzzzzzzzzzzzzz help.

33. Hta

Problem 1 and 2?

34. Gaby

35. Byrta

ANy further Problem 1 and 2 answers?

36. FLu

No, sorry was not succesful, any other had chance with problems 1 and 2?

37. Bart

Please other Problem 1 & 2!

38. Deas

Other problems in 1 and 2 please?

39. Magnum

Help problem 1 and 2?

40. bei

The composite bar is composed of an inner core of cross sectional area A and a sleeve of cross sectional area . The Young's modulus of the sleeve is and the modulus of the core is . Under the effects of unknown distributed loading, , the bar is observed to deform. The measured displacement field in the bar is , where is a dimensional constant and is the length of the bar. The origin of the x-axis is at the fixed support,10M . The maximum magnitude (absolute value) of stress in the core is found to be Pa.
plz help

## Similar Questions

1. ### physic

The bar in the figure has constant cross sectional area A . The top half of the bar is made of material 1 with mass density ro1 , and Young’s modulus E1 . The bottom half of the bar is made of material 2 with density ro2 and …
2. ### physics

bar subjected to gravity load (two segments) the bar in the fig has constant cross sectional area A .the top half of the bar is made of material with mass density and youngs module, the bottom half of the bar made of density and young …
3. ### physics

bar subjected to gravity load (two segments) the bar in the fig has constant cross sectional area A .the top half of the bar is made of material with mass density and youngs module, the bottom half of the bar made of density and young …
4. ### physics

bar subjected to gravity load (two segments) the bar in the fig has constant cross sectional area A .the top half of the bar is made of material with mass density and youngs module, the bottom half of the bar made of density and young …
5. ### Physics

The bar in the figure has constant cross sectional area A. The top half of the bar is made of material "1" with mass density ρ1, and Young’s modulus E1. The bottom half of the bar is made of material "2" with density ρ2 …
6. ### Physics

The bar in the figure has constant cross sectional area A. The top half of the bar is made of material "1" with mass density ρ1, and Young’s modulus E1. The bottom half of the bar is made of material "2" with density ρ2 …
7. ### Physic

The built-in composite bar BC of length L=2 m is composed of two materials with equal cross sectional area A = 100 mm2. The first material has elastic modulus E=1 GPa. The second material is twice as stiff, with a modulus of 2E or …
8. ### PHYSIC

The built-in composite bar BC of length L=2 m is composed of two materials with equal cross sectional area A = 100 mm2. The first material has elastic modulus E=1 GPa. The second material is twice as stiff, with a modulus of 2E or …
9. ### physics

A steel bar of length L=2 m, with modulus E=200 GPa and constant cross sectional area A=200 mm2 is constrained between two walls at its two ends A and B. A distributed axial load, fx(x)=−p0(1−3x2L), with p0=200 kN/m, is …
10. ### Physic

A bar has a constant cross sectional area A. The bar is devided in 2 segments segment 1 (1/3 of the bar) and segment 2 (2/3 of the bar). Segment 1 is made of a material with mass density ρ and Young's modulus E. Segment 2 is made …

More Similar Questions