Rangata
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# You're conducting a physics experiment on another planet. You drop a rock from a height of 2.3 m and it hits the ground 1.1 seconds later. What is the acceleration due to gravity on this planet? A. 4.2 m/s2 B. 3.8 m/s2 C. 2.4 m/s2 D. 9.8 m/s2

You get $2.3=1.21*\frac{a}2$ or $4.6=1.21a$ or $a=3.802$ (B)