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Q9) A 16 mm diameter steel cable running over a pulley is used to vertically lower a mass of 2 tonnes at a constant velocity of 0.2 m/s. The pulley suddenly jams when the length of the cable is 10 m.

Calculate EACH of the following:

a) the stress in cable due to the sudden stop; (14)

b) the extension of the cable due to the sudden stop. (2)

Note: Modulus of Elasticity for steel = 208 GN/m².