${}_{a_1}=40\frac{N}{m}{m}^2$

${}_{a_1}=60\frac{N}{m}{m}^2$

$P_{a_1}=100\frac{N}{m}{m}^2$

Calculate the necessany diameter of the rivets.

Calculate the sear stress to the weld seam under torsion.

Calculate the lo Lengh of the key.

Calculate the notation $($in degrees$)$ of the free end of the shaft, regarding re shaft as a forsion spring.