One day, the daughter of a physics teacher claimed that every time a person clicks a computer mouse button, they burn one kilocalorie. The teacher from Louisiana, skeptical of this claim, did the calculations to find out how many clicks are actually needed to burn one kilocalorie.
Assuming that pressing the mouse button requires a force of 0.5 newtons and that the distance the button travels is 1 millimeter, it was determined that to burn one kilocalorie, one would need to click the mouse button about 10 million times (10^-5 joules, or 10^-7 kilocalories per click). By the way, this would take only about 11.5 days of continuous clicking. So, get to work!