Melan

That depends on which planet you're on, so it's a hardware problem.

Indeed! Now we just need a bunch of engineers and an array of globally positioned super-efficient rocket engines to slow down the spin of the Earth. I'm sure the kickstarter crowd funding will be a great success when we tell the masses they will get more hours to their days.

Nature is at work on it already: http://www.physlink.com/Education/AskExperts/ae695.cfm