Answer: The answer is -12
Explanation: First we figure out the time, acceleration, distance, and initial and final velocity.
time = 1.22s
Initial velocity = 0m/s (because the ball was dropped meaning it wasn't moving in the beginning)
Acceleration = -9.8m/s^2 (acceleration for free fall/gravity)
Final velocity = ?
We do not have distance in the problem meaning we use Kinematic Equation number 1. Vf = Vi + at
2. Since Vi = 0, we can take it out and change the equation to Vf = at
3. We multiply (-9.8 * 1.22)
4. We get the answer -11.956 which we round to 3 significant figures making the answer -12m/s.