They can do that because they don't run out of steam easily
In a long distance race yes but in a short run no.
No
Yes and no; a long, lean racing horse will run faster than a short, stocky pony, but a Shire, a big, heavy draft horse, which is much bigger than a racing horse, would not be able to out run the racer. The length of legs, muscles, ability to breathe well, etc is important.
Horses are able to run long distances at a fast pace. They are also very big so they do not have many predators.
In track and field there is a long distance heat. In the long distance heat the runner will run over 3 miles. It is not usually as long as a cross country run.
in a way. the back legs support the horse and boost him off the ground to run. So yes. If the horse did not have back legs he would not be able to run.
If the horse is a Quarter Horse, it can run at over 50 mph. If it's anything else, it probably will run at about 40 mph. With barrels, however, the horse probably won't be able to reach full speed.
A Quarter horse is a sprinter and would not be able to sustain anything over a quarter of a mile distance at a gallop, they do not have endurance along with their speed, though they can work long hours at the walk and trot.Within a ten hour period a Quarter horse would only cover one or maybe two quarter mile distances.
they could but the horse wouldn't be able to run as fast as the hoses with light riders
It's possible. I think it depends on the horse and the bear. A small bear may not be able to run down a large horse, and the other way around. Terrain would factor in also. A bear when he charges can run as fast as a horse.
You must be very healthy to run a marathon. If you are not, things could go badly.
Horses are faster in the long run.