Two machines are monitored for their efficiency. Machine A puts out 250J of work for every 800J of work input. Machine B provides 500J of work for every 1200J placed into the machine.

Question

Which is more efficient? (1 point)
• Machine A
• Machine B

Answer 1

To determine which machine is more efficient, we can compare the output work to the input work for each machine.

Machine A: 250J of work output / 800J of work input = 0.3125 or 31.25% efficiency

Machine B: 500J of work output / 1200J of work input = 0.4167 or 41.67% efficiency

Therefore, Machine B is more efficient than Machine A.