PhoCLapreeg8riff PhoCLapreeg8riff 03-02-2017 Physics contestada Find the average acceleration of a northbound subway train that slows from 12 m/s to 9.6 m/s in 0.9 s Question 3 options: -2.7 m/s2 -2.7 m/s 2.7 m/s2 2.7 m/s