1.1 A single-pass rolling procedure reduces a 18mm-thick plate to 15.5mm. The starting plate has a 180mm width. Roll radius is 200mm, and rotational speed is 50rev/min. The work metal has a 380MPa strength coefficient and a 0.16 strain hardening exponent. Determine the required power, roll force, and roll torque for this operation. 1.2 A low-carbon steel plate is 250mm wide and 20mm thick. It is rolled down to a 15mm thickness in one pass in a two-high rolling mill. Roll speed is 20m/min, and the roll radius is 450mm. Strain hardening exponent is 0.20 , and the strength coefficient is 400MPa. Determine the roll force, roll torque, and power necessary to execute the operation. 1.3 Solve the previous problem using a roll radius =300mm. 1.4 Solve the previous issue using a cluster mill with working rolls that have a radius of 70 mm instead