Radar gun.
Contact or ask the American Quarter Horse Association (AQHA) about their speed index chart. It is issued annually so the one you find may not be the most recent one.
the speed
The average is 4 mph, but it depends on the horses speed.
average is 45 MPH
in the wild they were made to flee from predators
30, 40 MPH
I'm sure that average speed would be easier to calculate than instantaneous speed. To calculate average speed, just take the time that it takes to travel between two points, and divide that into the distance between the points.
It depends on the breed.
Thoroughbreds can race at speed of 25 to 45 MPH on average. The horses in the Preakness are high level horses that have learned to rate their speed but many will race in the 30 MPH range for the whole length of the race.
Speed = Wavelength X Frequency
time = distance ÷ speed
Yes.