Final answer:
When the weight of a trailer and its load exceeds a certain amount, brakes are required for safe stopping distances. The common threshold is 3,000 pounds or 1,361 kilograms. Specific regulations may vary, so it's important to check local regulations.
Step-by-step explanation:
In the context of trailers, when the weight of the trailer and its load exceeds a certain amount, brakes are required to ensure safe stopping distances. This weight limit varies depending on the jurisdiction, but a common threshold is 3,000 pounds or 1,361 kilograms. Trailers weighing above this amount must have brakes installed.
For example, a trailer weighing 3,500 pounds would be required to have brakes, while a trailer weighing 2,500 pounds would not.
It is important to check the specific regulations in your area to determine the weight at which trailers are required to have brakes.