Answer :
If the external world does work on a system, then work is positive and the energy of the system increases.
What is energy?
Energy is defined as the capacity of a physical system to perform work.
Given that in the question If the external world does work on a system than system is affected by the outside world, the work is positive and the system's energy rises. However, if a system interacts with the inside world, work turns negative and the system's energy declines. In conclusion, work is the mechanical transfer of energy.
If the external world does work on a system, then work is positive and the energy of the system increases.
To learn more about energy refer to the link:
brainly.com/question/1932868
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