Which of the following is the SI unit for energy?

• A. newton
• B. watt
• C. joule
• D. calorie

Answer: (C)

Verified step by step guidance

1. Understand that energy is a physical quantity that measures the capacity to do work or produce heat.
2. Recall that the SI (International System of Units) unit for energy is derived from the basic SI units of mass, length, and time.
3. Know that the joule (J) is the SI unit of energy, defined as the work done when a force of one newton moves an object one meter in the direction of the force.
4. Recognize that a newton (N) is the SI unit of force, not energy, and is defined as kg·m/s².
5. Note that a watt (W) is the SI unit of power (energy per unit time), and calorie is a non-SI unit of energy commonly used in food energy.