1. The maximum shear stress and twist angle in the material of a shaft should not exceed 40N/mm2, and 2° respectively. I

[answerhappygod]

1. The maximum shear stress and twist angle in the material of ashaft should not exceed 40N/mm2, and 2° respectively. Ifthe diameter of the shaft is 45mm and the shear pattern is79kN/mm2, determine the maximum length of the shaft. Howmuch power will the shaft transmit when it is rotating at 900rev/min?
2. A hollow arrow of external and internal diameter of 80mmand 50mm respectively with a length of 2m. If the maximum shearstress in the material of the shaft must not exceed55MN/mm2, determine the power that the shaft transmitswhen it rotates (turns) at 2000 rev/min. What will be the angle oftwist in the shaft at this speed. Take G=80 GN/m2.
3. A hollow shaft having an outside diameter to insidediameter ratio of 2:1 is subjected to a torque of 1500 Nm. If themaximum shear stress in the material of the shaft does not exceed70 MN/m2, determine the outside and inside diameters. ofthe arrow.