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Q8. A weight of 8. 5 kN falls a 5 mm vertical distance onto a steel bar as shown in Fig Q8. The bar has a length 200 mm and a cross sectional area of 2500 mm².

Calculate EACH of the following:

(a) the stress induced within the bar; (6)

(b) the stress if the same load is applied gradually; (8)

(c) the stress if the same load is applied suddenly without impact. (2)

Note: Modulus of Elasticity for steel = 200 GN/ m².