Question

D. Define: 14. Energy 15. Unit of energy​

Answer 1

Answer:

Energy is defined as the capacity of a physical system to perform work. However, it's important to keep in mind that just because energy exists, that doesn't mean it's necessarily available to do work.

15. The SI unit of energy is the joule (J) or newton-meter (N * m). The joule is also the SI unit of work.

Explanation:

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Answer 2

Answer:

Energy is the fundamental form of living for all living beings. There are different forms of energy on this planet. The Sun is considered as the elemental form of energy on the Earth. In Physics, energy is considered a quantitative property which can be transferred from an object in order for it to perform work. Hence, we can define energy as the strength to do any kind of physical activity.

As energy is defined via work, the SI unit of energy is the same as the unit of work – the joule, named in honour of James Prescott Joule