Starting from rest at home plate, a baseball player runs to first base (90 ft away). He...

Starting from rest at home plate, a baseball player runs to first base (90 ft away). He uniformly accelerates over the first 10 ft to his maximum speed, which is then maintained until he crosses first base. If the overall run is completed in 4 seconds, determine his maximum speed, the acceleration over the first 10 feet, and the time duration of the acceleration.