Which unit is used for measuring energy?

The Joule is the correct unit for measuring energy. It is defined as the amount of energy transferred when a force of one newton is applied over a distance of one meter. This unit is widely used in various scientific and engineering contexts to quantify energy, including thermal energy, mechanical energy, and electrical energy.

Understanding the distinction among different units is essential in the field of power engineering. For instance, while the Newton measures force, the Watt measures power, which is the rate at which energy is used or transferred, defined as one Joule per second. The Pascal is a unit of pressure, measuring force per unit area. These differing definitions highlight the specific role of the Joule in quantifying energy compared to the other units listed.