The trolley problem is an [[ethical]] [[thought experiment]]. In it, a trolley is moving fast down a track towards a switch. There are two tracks beyond this, on which one and five people respectively are tied up. If the trolley is not stopped, it will run over five people, killing them; the switch can divert it onto the second track, with just one person on it.

The trolley problem is easily solved by [[Newtonian spatially corrected total utilitarianism]], the correct [[ethical system]], as explained in [[https://osmarks.net/stuff/jor/newtonian_ethics.html|Implications Of a Newtonian Model for Spatially-Varying Ethical Reasoning and Considerations on Multi-Event Moral Significance Scaling]].