مساعدة يا شباب سوالين في مادة Solid

i am having problems solving two solid mechanics problems... can anyone please help me ??? the problems are:

[B]Question 4:

A 2380 Nm torque is applied to gear D due to input torque from the motor at A, as shown in figure 4. Shafts 1 and 2 are both solid steel, 44 mm in diameter and 600 mm long. Gear B has a diameter of 250 mm and gear C has a diameter of 350 mm. The shear modulus G for steel is 80GN/m^2



Find out:

(a) the maximum stress in shaft 2

(b) the maximum stress in shaft 1

(c) the rotation angle of gear D relative to the motor at A, due to the loading.

http://www3.0zz0.com/2012/02/02/00/234773347.jpg





center]The beam shown in Figure 1 is simply supported at the ends A and D .There are tow point loads and a distributed load as shown . the
flexural rigidity of the beam is 20 MNm.

Find the reaction at ends A and D (i)
(ii) Find the slope at position A in degrees.
(iii) Find also the deflection at position C in mm

http://www2.0zz0.com/2012/02/02/20/495633565.jpg