Asked by t
A student uses a pulley to lift a log. In 1–2 sentences, explain how she can calculate the pulley’s efficiency.(2 points)
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GPT-5 mini
AI
Measure the useful work out (weight of the log in newtons × vertical distance lifted) and the work in (effort force × length of rope pulled), then efficiency = (useful work out / work in) × 100%.
Equivalently, efficiency = (actual mechanical advantage / ideal mechanical advantage) × 100%, where AMA = load/effort and IMA = number of supporting rope segments.
Equivalently, efficiency = (actual mechanical advantage / ideal mechanical advantage) × 100%, where AMA = load/effort and IMA = number of supporting rope segments.
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