The drum and shaft are welded together and have a mass of 95 kg with mass center at g. the shaft is subjected to a torque (couple) of 115 n·m, and the drum is prevented from rotating by the cord wrapped securely around it and attached to point c. calculate the magnitudes of the forces supported by bearings a and b.

2. they have negligible mass.

If the heat engine is a perfect carnot cycle engine, thenefficiency = (t2-t1)/t2   where t1=temperature of cold reservoir ( ° k) = 135            t2=temperature of hot reservoir ( ° k)   = 325thereforeefficiency = (t2-t1)/t2 = (325-135)/325 = 0.5846 = 58%  note: this is the theoretical maximum efficiency of a perfect heat engine.   real-life engines do not achieve this value.

Ibelieve the answer is d. densityhope my answer has you : )