Question 4 A pendulum is suspended from a pin at point O as shown in the figure below. The pendulum is made up of two orthogonal slender rods, each weighing 90 N. Lengths m 1.5 m and n = 0.75 m. m (a) Calculate the moment of inertia of the pendulum about an axis passing through point O. [Hint: use Parallel Axis Theorem] (b) Calculate the length y, from point O to the centre of mass of the pendulum at point G. (c) Determine the moment of inertia of the pendulum about an axis pass through the centre of mass at point G of the pendulum. (d) If the pendulum was given a torque of 60 Nm and started swinging about point O, what is the angular acceleration experienced by the pendulum?

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Forming and Shaping

Metal forming is a category of metalworking process through which the material can be given the desired shape and size by subjecting it to plastic deformation, where the component undergoes bulk deformation process upon application of loads. Unlike the shearing and machining process, the material does not undergo up to a failure point as indicated in the stress-strain curve. Hence, the stresses induced during the forming process are greater than yield strength but less than the failure strength of the material. The process does not lead to the loss of material, so it can be said to be an economical process. During forming, the material is subjected to tensile forces, compressive forces, bending, and shearing loading conditions. The material should possess the property of ductility to undergo the forming process.