Machine Output Work (J) Input Work (J)
A 750 1,500
B 1,000 4,000
C 450 600
D 3,000 5,000
Which machine has the highest efficiency?
(1 point)
Responses
machine B
machine B
machine A
machine A
machine D
machine D
machine C
The efficiency of a machine is calculated by dividing the output work by the input work and multiplying by 100% to get a percentage.
Machine A:
Efficiency = (750 J / 1,500 J) * 100% = 50%
Machine B:
Efficiency = (1,000 J / 4,000 J) * 100% = 25%
Machine C:
Efficiency = (450 J / 600 J) * 100% = 75%
Machine D:
Efficiency = (3,000 J / 5,000 J) * 100% = 60%
Therefore, Machine C has the highest efficiency with 75%.