Which of the following is NOT an example of potential energy?
Running water
Correct Answer: Option 4 – Running water
Explanation:
Potential energy is the stored energy possessed by an object due to its position, state, or configuration.
Running water is in motion. Energy possessed by an object due to its motion is called kinetic energy, not potential energy.
Kinetic Energy Formula:
Ek = 1/2 × m × v²
The faster the water flows and the greater its mass, the higher its kinetic energy.
Why the other options are examples of potential energy:
Option 1: Water stored in a dam
- Example of gravitational potential energy.
- Water is stored at a height and has energy due to its position.
- When released, this energy converts into kinetic energy.
Option 2: A raised hammer
- Example of gravitational potential energy.
- Energy is stored because the hammer is lifted against gravity.
- This energy is released when the hammer falls.
Option 3: A compressed spring
- Example of elastic potential energy.
- Energy is stored when the spring is compressed or stretched.
- The stored energy is released when the spring returns to its original shape.
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