If a factory machine pedal is too far, what ergonomic problem may occur?

Correct answer: Uneven stretch of leg and body

Direct answer: Option A, uneven stretch of the leg and body. Ergonomics means designing a workplace, machine and controls so that they suit the worker’s body and movements. If a pedal is placed too far away, the worker must extend the leg and may lean or twist the trunk to reach it. Step by step: the pedal is distant; the foot reaches forward; the leg becomes overextended; the body may lose a natural posture; strain, discomfort or reduced control may result. Option A correctly describes this uneven stretching and disturbed posture. Option B, better comfort, is the opposite of what normally happens when a worker must stretch repeatedly. Option C, less risk, is not expected because awkward reaching can increase physical risk. Option D, more stable posture, is also opposite because leaning and stretching can reduce stability. Remember: a control should be within easy, safe reach.