1. The problem statement, all variables and given/known data (NB: posted earlier, but didn't agree with PF policy, so reposting as requested; apologies). When a plane is in a steep dive, people say they feel ''weightless''. Do they in reality? Explain your answer. What do they actually mean by ''weightless''? 2. Relevant equations W=mg F = (G * m1 * m2)/(r^2) I am not sure whether any other equations can be used? 3. The attempt at a solution So, no, they are not weightless because there are other masses around exerting a force on them. But I am not sure why we perceive it as ''weightless''. Could anyone help with this aspect of the question? Thanks in advance!