A cold-rolled sheet metal that is 40 mm wide and has a thickness of 5.00 mm is going to be bent into a V shape with a 60° angle. The die opening dimension is 50 mm. Each of the two straight sides of the bent part will be 50 mm long. The bend has a radius of 10 mm. The steel tensile strength is assumed as 400 MPa. Determine:
a. The required blank size to provide the final workpiece dimensions
b. The force required to bend the part

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.