Lengths

Is it five car lenghts between cars or two?
How many car lengths should be between you and another car? Rule #1 Do Not Tailgate Here's the deal. Figure one car length for every ten miles an hour...
Four car lengths equates to what distance?
How many car lengths is a second? Unless you specify a speed, the question is unanswerable. Assuming 60 mph which is 88 feet per second, 2 seconds is ...