Final answer:
The restrictions vehicles may not exceed include weight, length, speed, and height limits. These regulations ensure safety and protect infrastructure, such as roads and bridges, from damage due to overly heavy or large vehicles. Specific examples in physics include calculations around a truck's mass, hill height, and the maximum load a railcar can carry.
Step-by-step explanation:
No combination of vehicles, other than a truck tractor-trailer combination, may exceed certain restrictions based on weight limit, length limit, speed limit, and height limit. However, the question seems to be pertaining specifically to the length or weight restriction, as those are typically the limits that are special to combinations of vehicles differing from a truck-tractor trailer combination.
All vehicles operating on public roads, including combinations of vehicles like truck tractor-trailer combinations, must adhere to specific regulations for safety and infrastructure preservation.
For example, there are weight limits to prevent damage to roads and bridges, length limits to ensure the safe maneuverability of vehicles, speed limits to reduce the risk of accidents, and height limits to prevent vehicles from striking overpasses and tunnels.
Examples connecting to these concepts include situations where a truck's mass and the height from which it rolls down a hill could affect its eventual velocity, considering potential energy converting into kinetic energy. In addition, considerations like the maximum mass a railcar can take before its speed drops below a certain threshold are examples of weight restrictions that vehicles must comply with for safe operation.