Chapter 1, Problem 1.23PP

A body starting from rest with constant acceleration moves according to the relationship s= $\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$2$}\right.$ at², where

s = distance, a = acceleration, and t= time.

1.23 If a body moves 3.2 km in 4.7 min with constant acceleration, calculate the acceleration in

ft/s².