This from an IRV2 discussion on whether some one needs to have brakes on their trailer and includes a couple of ideas I had not thought of and the last one, liability. I contributed my usual "it is better to have them and not need them, than to need them and not have them".
"There are two or three sets of laws.
Criminal/Traffic law varies from place to place, and at 2100 pounds, Some say yes, some say no, I can't say less you live in Michigan what yours says.
Physics says: If all wheels are braking, then your skid distance in a panic stop is the same as mine, or the next guy's, or the person in front of you ON ANY GIVEN SET OF ROAD CONDITIONS
(That is I might skid farther or less, but on the very same stretch of road within 5 seconds of each other, Same distance.. Vehicle size really does not matter SO LONG AS ALL BRAKES LOCK.
However, if you have a trailer with no brakes,,, It can add to the total stopping distance big time . US-Gear for motor homes towing a car says "Up to 30%" in your case I'm thinking double.
The formula with all wheels braking Speed^2*K (Where K is determined by the road at the time) With only some wheels braking, It is very long and complex.
The third set of laws is civil liability: Think "Reckless Endangerment" and how rich can you make the guy you rear ended... OUCH big time, even if there is no injury."