what is the top speed for a human
The fastest human footspeed on record is 44.7 km/h (12.4 m/s or 27.78 mph), seen during a 100 meters sprint (average speed between the 60th and the 80th meter) by Usain Bolt. Maximum human sprint speed is strikingly slower than that of many animals.
According to Fox News, humans—who top out at roughly 23 mph —may one day be able to reach phenomenal speeds of up to 40 miles per hour. That study showed that speed is based more on contracting muscle fibers than it is negated by sheer force of running.