Use the table to answer the question.

Question

Machine Output (J) Efficiency (%)
A 750 60
B 1,000 40
C 450 30
D 3,000 75
A manufacturer is given the output work and efficiencies of four different machines. Which machine will require the least input work?

(1 point)

machine B

machine D

machine A

machine C

Answer 1

To find the input work, we need to use the formula: input work = output work / efficiency.

Machine A: input work = 750 J / 60% = 1,250 J
Machine B: input work = 1,000 J / 40% = 2,500 J
Machine C: input work = 450 J / 30% = 1,500 J
Machine D: input work = 3,000 J / 75% = 4,000 J

Therefore, machine A will require the least input work at 1,250 J. Answer: machine A.