Is work done when you blink your eyes?

No, work is not done when you blink your eyes.

Work is defined as the transfer of energy over a distance against an opposing force. In order for work to be done, both a force and a displacement must be present in the same direction.

When you blink your eyes, the muscles surrounding your eyelids contract, creating a force. However, this force does not result in any significant displacement because the movement of your eyelids is negligible. Additionally, there is no opposing force acting against the movement of your eyelids during blinking.

Therefore, while the contraction of your eyelid muscles involves energy expenditure, it does not meet the criteria for work because there is no substantial displacement against an opposing force. Thus, we can conclude that blinking your eyes does not constitute work in the physical sense.