The base of an aluminum block, which is fixed in place, measures 90 cm by 90 cm, and the height of the block is 60 cm. A force, applied to the upper face and parallel to it, produces a shear strain of 0.0060. The shear modulus of aluminum is 3.0 x 1010 N/m2. What is the displacement of the upper face in the direction of the applied force? O 4.2 mm O 3.0 mm 3.6 mm O 54 mm O 4.8 mm Submit Request Answer

An 8.03-kg stone at the end of a steel (Young's modulus 2.0 x 1011 N/m2) wire is being whirled in a circle at a constant tangential speed of 19.8 m/s. The stone is moving on the surface of a frictionless horizontal table. The wire is 4.22 m long and has a radius of 4.94 x 10-3 m. Find the strain in the wire.

2. The tires of an agricultural tractor shown below are assumed to be 25 cm wide for the front tires and 40 cm at the rear tires. Ground contact of each tire is 15 cm. Calculate the compressive stress between each tire and the ground surface. Weight = 2,500 kg 15 cm 1.3m Point A 2.2 m 2R 2F

3. The propeller of a fishing boat is rigidly connected to a 3.8-cm. driveshaft through a O.95- cm diameter steel bolt. The bolt was designed to shear/break when the shear stress caused by hitting an underwater debris or obstruction reaches 180 MPa. Determine the contact force on the propeller blade (upon hitting a debris or obstruction) that will cause the bolt to shear/break. Assume the contact point of the debris or obstruction on the blade is 10- cm from the center of the propeller. Contact point of debris or obstruction Fc Fs- shearing force Fc- contact force T- torque Bolt 10 cm Driveshaft Fs Fs-