A250mm wide and 25mm thick plate is to be reduced in a single pass in a 2-high rolling mill to final thickness of 20mm. the roll has a radius of 250mm and its speed is 19.1 rev/min. the work material has a strength coefficient of 240mpa and a strain hardening exponent 0.2. determine a) the roll force, f b) the roll torque, t c) power, p, required to accomplish the operation.

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79

Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.

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.