What term describes the ability to do work or cause change?

What term describes the ability to do work or cause change?

• A. Power
• B. Energy
• C. Forces
• D. Momentum

Answer: (B)

The main idea here is energy—the capacity to do work or to cause change. Energy is like the potential to make something happen. Work is what you do when a force acts over a distance, and energy is what enables that work to be done (it can exist in many forms, such as kinetic, potential, chemical, or electrical). For example, a stretched spring has potential energy that can be released to move an object, converting energy into motion and performing work. A light bulb uses electrical energy to produce light and heat, causing changes in its surroundings. Power, on the other hand, is about how fast that work is done—it’s the rate of doing work, not the ability to do it. Forces describe pushes or pulls that can cause changes in motion, and momentum describes the quantity of motion an object has, not the overall capacity to cause change. So energy is the best term for the ability to do work or cause change.

The main idea here is energy—the capacity to do work or to cause change. Energy is like the potential to make something happen. Work is what you do when a force acts over a distance, and energy is what enables that work to be done (it can exist in many forms, such as kinetic, potential, chemical, or electrical). For example, a stretched spring has potential energy that can be released to move an object, converting energy into motion and performing work. A light bulb uses electrical energy to produce light and heat, causing changes in its surroundings.

Power, on the other hand, is about how fast that work is done—it’s the rate of doing work, not the ability to do it. Forces describe pushes or pulls that can cause changes in motion, and momentum describes the quantity of motion an object has, not the overall capacity to cause change. So energy is the best term for the ability to do work or cause change.