Question

You're conducting a physics experiment on another planet. You drop a rock from a height of 2.1 m and it hits the ground 0.6 seconds later. What is the acceleration due to gravity on this planet?
A. 7.0 m/s2
B. 9.8 m/s2
C. 11.7 m/s2
D. 5.2 m/s2

(What formula should I use to solve this on my own?)

Answer 1

Answer:

11.7 m/s2

Explanation:

Apex ; good luck everyone! :)

Answer 2

The formula to use is the one that connects the acceleration,
the distance fallen, and the time spent falling:

         Distance = 1/2 a T² .

You said  2.1 meters in 0.6 second .

                                                         2.1 m              = 1/2 a  (0.6 sec)²

Multiply each side by  2 :                  4.2 m              =       a (0.6 sec)²

Divide each side by (0.6 sec)² =     (4.2/0.36) m/s² =        a

                                                         a = (11 and 2/3) m/s²

                                        (about 19% more than Earth's gravity)