How long does it take to stop a semi going 37 mph weighing 79500 pounds?

Answer 1

Depends a lot on the breaks and the load. A liquid load will push u more once it hits the front. A solid load will not. Given new breaks the tires may slide a little loaded but not usually. Old glazed breaks will take much longer. The break adjustment also makes a big difference if there are a little tight like we run ours then a little sooner. If there are just within DOT spec then much longer. 50 feet I think would be a good stop at that speed. That's not any math calculations just my own experience in stoplights. But also need to figure in the truck. As some will put more air pressure to the break cans then others. Most around 100 in a panic stop. One last factor. The break cams. If well greased and turn free will put more of the break can pressure to the rollers and to the breaks. An old truck still meeting dot inspection with old sticky cams will take almost 10 percent of the break effort just to tun the cams under that much force. And yes one more. Depends on abs system. If good road conditions and no tire skip them that's notan issue. But if tire slide can be an issue then the abs. Ecm and actuation valves can be a big factor. Hope this helps. And sorry there is now mesument for exact feet or time. Its all on the conditions.