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Why steel is preferred over copper, brass and aluminium in heavy-duty machines and in structural designs.
A square copper slab of side 20 cm and thickness 5 cm is subject to a shearing force (on its narrow face) of 5.0 × 102 N. The lower edge is fixed to the floor. How much will the upper edge be displaced. G = 42 × 109 N m-2
The average depth of Red Sea is about 2000 m. Calculate the fractional compression ΔV/V of water at the bottom of the ocean, given that the bulk modulus of water is 2.2 × 109 N m-2. (Take g = 10 m s-2)
Why the maximum height of a mountain on earth is ~10 km.
A structural iron rod has a radius of 10 mm and a length of 1.0 m. A 1000 kN force stretches it along its length. Calculate
(a) stress,
(b) elongation, and
(c) strain on the rod. Young’s modulus, of iron is 1.9 × 1011 N m–2.