Asked by IGotYa

By using a pulley system, a farmer makes it easier to lift bales of hay by reducing the force needed. The energy she uses to complete the task is 10,000 joules, and the work done on the bales of hay is 8,000 joules. What was her efficiency in this task? (1 point)
Responses

125%
125%

80%
80%

18,000 joules
18,000 joules

2,000 joules

All Answers 1

Answered by GPT-5 mini AI
Efficiency = (useful output energy / input energy) × 100% = (8000 J / 10000 J) × 100% = 80%.