You are towing a broken-down car along the N50. You notice the cable sags now and then and afterwards pulls taut again with a jerk. What is sensible?
Have the driver behind brake a little more, so the cable stays taut
Lengthen the cable to well over 5 m, so the cars have more slack
Just keep driving: a cable that sags now and then is part of towing
Explanation
False — you think more distance is safer. When towing there is at most 5 metres between the vehicles and the cable stays taut; more slack is exactly the problem (Book p.169).