QUESTION 8 A torque T is applied on an aluminium shaft acting at the ends (see figure). The shaft is 1.2 m long, and has a solid circular cross-section with diameter of 30 mm. Assuming that shear modulus is G= 28 GPa, and the angle of twist is 4.4°, calculate is the maximum shear stress. T. Find your answer in N/m2.

Joe takes his little brother Andy down the the playground for an afternoon out. Andy would like to ride the seesaw, but the difference in their sizes, Joe weights 160lbs and Andy weighs 641lbs, makes this difficult. Joe sees a solution from his engineering class and moves the fulcrum from the middle to a new place. The seesaw is 3.5m long. After Joe moved the fulcrum how long was the seesaw on Joe's side?

The U-tube shown in Figure Q3 (a) is rotated about one of its arms at an angular speed of o rad/s. At o = 0 rad/s, the U-tube contains 20-cm-high alcohol in both arms Q3 (a) Determine the new o when the elevation difference between the fluid surfaces in the two arms is 30 cm.

Draw a circular hole of 2cm deep and give dimensions to it.