A baby-swing motor provides 0.31 W at 5,700 rpm to a shaft that has a diameter of 2.41 mm and a length of 14.7 mm. Determine the maximum shear stress in the shaft.

The solid circular steel shaft of a screwdriver is subjected to a pure torque of T = 20 lb·in. The shaft has a diameter of 0.237 in. and a length of L = 3.50 in. The shear modulus of the steel is G = 11,600 ksi. Determine the magnitude of the angle of twist of the shaft in degrees.

A dump truck axle with a diameter of 1.70 in. and a length of 37 in. failed while transmitting a power of 420 hp and a torque of 6,030 lb-ft. At what speed was the axle spinning when it broke?

A torque of 22 lb·in. is applied to one end of a 7-in.-long composite shaft that consists of two polymer tubes. The outer tube has a polar moment of inertia of 0.0406 in.4 and a shear modulus of 180 ksi. The inner tube has a polar moment of inertia of 0.00779 in.4 and a shear modulus of 160 ksi. Determine the magnitude of the torque produced in the outer tube.

A gear train is composed of four gears, where gears A and B are on the same shaft. Gear A has 60 teeth, gear B has 36 teeth, gear C has 48 teeth, and gear D has 12 teeth. If a torque of 1.221 N·m is applied to gear D, determine the torque at gear A.

A steel socket extension (2) has a diameter of 0.32 in. and a length of L = 2.0 in. It connects socket (3) to ratchet handle (1) which is 5.2 in. long. If a perpendicular force of 8.0 lb is applied to the end of the ratchet handle, determine the maximum shear stress in the socket extension.

A baby-swing motor provides 0.23 W at 6,000 rpm to a shaft that has a diameter of 2.03 mm and a length of 12.4 mm. Determine the maximum shear stress in the shaft.

The solid circular steel shaft of a screwdriver is subjected to a pure torque of T = 25 lb·in. The shaft has a diameter of 0.249 in. and a length of L = 4.50 in. The shear modulus of the steel is G = 11,300 ksi. Determine the magnitude of the angle of twist of the shaft in degrees.

A torque of 25 lb·in. is applied to one end of a 7-in.-long composite shaft that consists of two polymer tubes. The outer tube has a polar moment of inertia of 0.0325 in.4 and a shear modulus of 165 ksi. The inner tube has a polar moment of inertia of 0.00169 in.4 and a shear modulus of 190 ksi. Determine the magnitude of the torque produced in the inner tube.

The same perpendicular force is applied to the handles of three ratchets and creates torque. They have the same modulus of rigidity but different lengths and diameters. Which one will provide the smallest torque?