A ball is thrown vertically down from the edge of a cliff with a speed of 4 m/s,
how high is the cliff, if it took 12 s for the ball to reach the ground?
By using the equation speed = distance/time we can solve for distance. The speed is 4 m/s and the time is 12 seconds. We need to rearrange the equation to Speed * Time = distance. 4(12) = 48; 48 = distance. The cliff is 48 meters high.