Which of the following represents an item with kinetic energy?
A stone in motion
To determine which item has kinetic energy, we must understand what kinetic energy is: it is the energy an object possesses due to its motion. Among the options:
A compressed spring: This has potential energy because the energy is stored and could be released as kinetic energy if the spring is allowed to expand.
A book resting on a table: This item is not in motion, so it does not have kinetic energy.
An extended rubber band: Similar to the compressed spring, this has potential energy because the energy is stored in the band due to its stretched position.
A stone in motion: This option represents an object that is moving, and hence, possesses kinetic energy.
Therefore, the correct answer is: A stone in motion.
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