Chapter 2 - One-Dimensional Kinematics - Problems and Conceptual Exercises - Page 52: 61

$|a|=1.8\times10^{4}~m/s^2=180~g$

$173~km/h=(173~km/h)(\frac{1000~m}{1~km})(\frac{1~h}{3600~s})=48.1~m/s$ $v^2=v_0^2+2a\Delta x$ $0^2=(48.1~m/s)^2+2a(0.66~m)$ $(-1.32~m)a=2313.36~m^2/s^2$ $a=\frac{2313.36~m^2/s^2}{-1.32~m}=-1.8\times10^{4}~m/s^2$ $|a|=1.8\times10^{4}~m/s^2$ $g=9.81~m/s^2$ $1.8\times10^{4}~m/s^2=(1.8\times10^{4}~m/s^2)(\frac{1~g}{9.81~m/s^2})=180~g$