# Chapter 3 - Think and Explain: 70

The extended tables are given below. Note that the equation given in the textbook, in the bottom row of Table 3.3, reads $10 t^{2}$. It is missing a factor of $\frac{1}{2}$. It should read $\frac{1}{2}gt^{2}$, or $5 t^{2}$.

#### Work Step by Step

Extension of Table 3.2, free fall from rest Time of fall (seconds) Velocity acquired (m/s) 6 60 7 70 8 80 9 90 10 100 Extension of Table 3.3, distance fallen in free fall from rest Time of fall (seconds) Distance fallen (m) 6 180 7 245 8 320 9 405 10 500

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