Answer
44 g.
Work Step by Step
Their final velocity is zero, and their starting velocity is 26.4 m/s. Find the acceleration from equation 2–11c.
$$a=\frac{0-(26.4 m/s)^2}{(2)(0.8 m)}= -436 \frac{m}{s^{2}}$$
The magnitude of the acceleration is $\approx 440 \frac{m}{s^{2}} \approx 44g$.
