Which of the following is a unit of energy?

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Multiple Choice

Which of the following is a unit of energy?

Energy describes how much work could be or has been done. In the SI system, the unit of energy is the joule. A joule is defined as the amount of work done when a force of one newton moves an object one meter in the direction of the force; equivalently, energy can be viewed as force times distance. Power, measured in watts, is the rate at which energy is transferred or used—one watt equals one joule per second. A newton is a unit of force, not energy, and a volt is a unit of electrical potential difference, not energy by itself. Understanding these distinctions helps distinguish how much energy is present from how quickly it’s being used or transferred.

Energy describes how much work could be or has been done. In the SI system, the unit of energy is the joule. A joule is defined as the amount of work done when a force of one newton moves an object one meter in the direction of the force; equivalently, energy can be viewed as force times distance. Power, measured in watts, is the rate at which energy is transferred or used—one watt equals one joule per second. A newton is a unit of force, not energy, and a volt is a unit of electrical potential difference, not energy by itself. Understanding these distinctions helps distinguish how much energy is present from how quickly it’s being used or transferred.

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