a single v belt is to be selected to deliver engine power to the wheel-drive transmission of a riding tractor. a 5-hp single-cylinder engine is used but at most, 60 percent of this power is transmitted to the belt. the driving and driven sheaves have diameter of 6.2 and 12.0 inches respectively. the belt selected is b90. the engine speed is governor-controlled to a maximum of 3100 rev/min. the service factor for such application is about 1.3 and the design safety factor is 1. (a) 5 points: calculate the forces in the belt system (f1 and f2; fc and fi) (b) 5 points: assess the actual factor of safety for the belt chosen and the belt life in the number of passes.