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isaiahromero15

isaiahromero15

30.09.2019 •

Physics

What is the difference between longitude and latitude?

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Ответ:

genyjoannerubiera

04.01.2022

Think of longitude as long line thats flat and latitude is a ladder thats tall, so longitude is horizontal and latitude is vertical

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Ответ:

Tyrant4life

04.05.2020

Complete Question

The complete question is shown on the first uploaded image

The cross-sectional area is A =1.6815 m^2

Explanation:

The free body diagram of the link is shown on the second uploaded image

From the question we are told that

Ultimate normal stress in the link AB = 450MPa

Factor safety =3.59

From our free diagram we can see that the moment about B is 0 Mathematically

$\sum M_b =0$

But $\sum M_b = -(20*0.4)-\frac{8(1.2)^2}{20} + D_y (0.8)$

Hence $-(20*0.4)-\frac{8(1.2)^2}{20} + D_y (0.8) =0$

Making D_y the subject

D_y = 17.2kN

At equilibrium summation of all force is 0 mathematically

This means

$\sum F_y =0$

i.e $F_{BA} sin 35^o +D_y - 8(1.2) -20 =0$

$F_{BA} = \frac{8(1.2)+20-17.2}{sin35^o}$

$F_{BA} =21.62kN$

The factor of safety is mathematically

Factor of safety $= \frac{\sigma _u}{\sigma _{ all}}$

Where $\sigma_u$ is the normal stress

$\sigma_{all}$ is the allowable stress this mathematically given as

$\sigma_{all} = \frac{F_{AB}}{A}$

$3.5 = \frac{21.62*10^3}{A}$

$Factor\ of \ safety =\frac{450*10^6}{[\frac{21*10^3}{A} ]}$

Making A the subject

$A = \frac{3.5*21*10^3}{450*10^6}$

$= 1.6815*10^{-4} m^2$

Link AB is to be made of a steel for which the ultimate normal stress is 450 MPa. Determine the cros

Link AB is to be made of a steel for which the ultimate normal stress is 450 MPa. Determine the cros

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