What is the unit of power in the International System of Units?

The unit of power in the International System of Units (SI) is the Watt. Power is defined as the rate at which work is done or energy is transferred over time. One Watt is equal to one Joule per second, which means that if one Joule of energy is used in one second, the power output is one Watt. This makes the Watt an essential unit in various fields, including physics and engineering, where understanding the rate of energy consumption or output is crucial for assessing performance and efficiency.

In contrast, Joules measure energy, Newtons measure force, and Pascals measure pressure, which are different physical quantities. Therefore, while they are all important in their respective contexts, none represent the concept of power as directly and accurately as the Watt does.