You've been called in to investigate a construction accident in which the cable broke while a crane was lifting a 4500 kg containerThe steel cable is 2.0 cm in diameter and has a safety rating of 50000 NThe crane is designed not to exceed speeds of 3.0m/s or accelerations of 1.0 m/s^2, and your tests find that the crane is not defectiveWhat is your conclusion? Did the crane operator recklessly lift too heavy a load? Or was the cable defective?a The crane operator recklessly lifted too heavy a load.b The cable was defective.
Not 100% sure, but 4500kg times 9.8144,145NewtonsIf FMA and A never exceeded 1m/s-1 then the mass lifted was within the cranes so called safety ratingSo, it seems to me the cable was defectiveThis sort of question would never happen in real life as a crane has a data plate giving safe working loads in metric tonnes in the cab and very large safety margins.
