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vickie2370
29.03.2020 •
Physics
If you do 10 J of work while operating the scissors and the scissors do 20 J of work cutting the paper, what is the efficiency of the scissors?
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Ответ:
The efficiency of the scissor is 200%.
Explanation:
Efficiency is defined as the ratio of output of any instrument or device or machine to the input supplied to it. So the greater the output the greater will be the efficiency of the device.
As here the work done by us on the system is said to be 10 J so this will be equal to the input work done on the system. And the work done by the system i.e., the scissor is 20 J, so this will be the output work.
So, the efficiency is the ratio of output to input as shown below.
Efficiency =
= 200
So, the efficiency of the scissor is 200%.
Ответ:
I think this is right and I hope this helped you! :)