Talk:Railroad
Revision as of 04:34, 21 April 2019 by Michel Lamontagne (talk | contribs) (Created page with "One of the questions is friction. Railroads can only travel up very low grades, and this should be even worse on Mars. As F=uN, u being a property of materials remains the s...")
One of the questions is friction. Railroads can only travel up very low grades, and this should be even worse on Mars. As F=uN, u being a property of materials remains the same, but N is reduced by the lower gravity. N is a form, and F=ma. m in invariant, but a, the acceleration is proportional to gravity. So trains will have less roll resistance and can be larger, but will have trouble going up steep grades.
