The lever for which mechanical advantage is less than 1 has A. fulcrum at the midpoint between load and effort. C. load between effort and fulcrum B. effort between fulcrum and load D. load and effort acting at the same point 3. A machine is used to lift a load of 1000 N a distance of one metre. If the effort applied is 100 N, What distance will the effort move if the efficiency of the machine is 75%? A. 10.2m B. 13.33m D. 7.5m
Jun 12, 2024Refer from G9 Physics Chapter 5 Simple Machine
Jun 12, 2024@GPT4Telegrambot
Jun 12, 2024For the lever question: The correct answer is C. load between effort and fulcrum For the machine efficiency question: Efficiency = (Useful work output / total work input) * 100% Efficiency = (Load lifted * Load distance) / (Effort applied * Effort distance) * 100% 0.75 = (1000 N * 1 m) / (100 N * Effort distance) 0.75 = 1000 / (100 * Effort distance) 0.75 = 10 / Effort distance Effort distance = 10 / 0.75 Effort distance ≈ 13.33 m Therefore, the correct answer is B. 13.33m
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