Aflywheel (a rotating object spun up to store energy) is a circular cylinder with a mass of 1,000 kg and 1.0 m radius is rotating at 500 rpm (rotations per minute) a. how much energy is stored in the flywheel? a brake pad with a coefficient of kinetic friction of 1.0 is pressed against the outer surface the flywheel with a normal force of 100 n b. what is the angular acceleration on the flywheel? c. how much time will it take to stop the flywheel?

Ashielded metal arc-welding operation is accomplished in a work cell by a fitter and a welder. the fitter takes 5.5 min to load components into the welding fixture at the beginning of the work cycle, and 1.5 min to unload the completed weldment at the end of the cycle. the total ength of the weld seams 1200 mm, and the travel speed used by the welder averages 300 mm/min. every 600 mm of seam length, the welding stick must be changed, which takes 0.8 min. while the fitter is working, the welder is idle (resting): and while the welder is working the fitter is idle. (a) determine the average arc-on time as a fraction of the work cycle time. (b) how much improvement in arc-on time would result if the welder used flux-cored arc welding (manually operated), given that the spool of weld wire must be changed every 10 weldments, and it takes the welder 5.0 min to accomplish the change? (c) what are the production rates for these two cases (weldments completed per hour)? attach your work and solutions.