That'll be dependent on the configuration and state laws. United States Federal DOT regulations allow for a total of 34,000 lbs on tandem drive axles, and the front steer axle may have up to 20,000 lbs. so long as the vehicle doesn't go over the allowed weight rating.
State law may allow for heavier weight ratings on secondary roads, but usually not on federally maintained Interstate highways unless the state was granted a grandfather clause for their permissible weight rating when the federal DOT regulations were established.
For information pertaining specifically to your state, you would be best advised to contact your state's Department of Motor Vehicles or motor carrier enforcement agency (which will usually be some division of the State Police in US states, the MTO in Ontario, or a division of the RCMP in the remainder of Canada).
A typical fully loaded concrete delivery truck can weigh up to 70,000 pounds (35 tons). An empty truck weighs between 20,000 and 30,000 pounds and a full load of 10 cubic yards of concrete weighs about 40,000 pounds. That said, concrete with 5 to 8% air entrainment for freeze/thaw protection will weigh proportionally less. In hilly terrain, trucks may be somewhat short loaded to prevent spillage during transit. Considering these and other small variations, total weights are approximate.
Because the increased weight increases the stopping distance of the vehicle.
very tall
Fully loaded
2856kg fully loaded or... 1800kg un-loaded or empty
Newton's laws of Motion state that Momentum is a product of Mass times velocity. Momentum = Mass x velocity. Therefore, a loaded truck needs a larger force to move it, and once it's moving, it needs more powerful brakes to stop it. So a fully loaded truck will have more momentum and be harder to stop than an empty truck.
It depends on the density of the material that is loaded on the truck.
Concrete now comes in cubic meters. There is 2.2 tons to each cubic meter of concrete plus whatever the size if the truck is. An 8 meter truck is about 32 tons full, 6 meter truck is about 26 tons full and a minni mix (4 meters) is about 22 tons full. This is just a rough guide. Regards Colin
Clearly the truck, as it is heavier
Depends on the size and duty level of the truck. Typically they are well over 26,000lb fully loaded.
because it is affected by gravity
A fully loaded standard semi-trailer truck typically weighs around 30,000 kg.