For a machine with an efficiency of 80%, what is the work output of the machine if its work input is 2,000 joules?
would i divide 2000/.80? which gives me 2500?
Yes, you are on the right track! To calculate the work output of a machine, you need to divide the work input by the efficiency of the machine.
In this case, the work input is given as 2,000 joules, and the efficiency of the machine is 80% or 0.80. To find the work output, divide the work input by the efficiency:
Work Output = Work Input / Efficiency
Work Output = 2,000 joules / 0.80
Work Output = 2,500 joules
So, the work output of the machine is 2,500 joules.