Which of the following is the SI unit used to measure energy?

• A. Joule
• B. Watt
• C. Newton
• D. Pascal

Answer: (A)

Verified step by step guidance

1. Understand that energy is a physical quantity that represents the capacity to do work or produce heat.
2. Recall that the SI unit system assigns specific units to different physical quantities, such as force, pressure, power, and energy.
3. Identify the SI unit for energy by remembering that energy is measured in joules, which is defined as the work done when a force of one newton moves an object one meter.
4. Recognize that the other units listed correspond to different physical quantities: watt is the unit of power, newton is the unit of force, and pascal is the unit of pressure.
5. Conclude that the correct SI unit for energy among the options given is the joule.