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Why can continuous use of a very heavy tool be harmful ergonomically?

Answer and explanation

Correct answer: It puts excessive force on the hand and shoulder

Answer: A, a heavy tool puts excessive force on the hand, arm, and shoulder. Ergonomics studies how work, tools, and the working environment can be designed to suit the human body. If a tool is very heavy, the worker must apply greater muscular force to hold, lift, or control it. Repeating this action continuously can cause fatigue, discomfort, muscle strain, and a greater risk of overuse injury. B is wrong because a heavy tool does not always save time; fatigue may actually reduce efficiency. C is the opposite of the likely effect, because extra effort generally increases fatigue. D is wrong because tool weight by itself does not improve posture and may encourage awkward postures. A is correct. Memory cue: excessive load plus repetition usually means greater body strain.

Related tags

ErgonomicsTool WeightMuscle StrainErgonomics: DefinitionNeed And BenefitsErgonomics Definition Need And BenefitsWorkLivelihood And CareerWork Livelihood And CareerHome Science

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