A flowerpot is knocked off a balcony 20 m above the sidewalk and falls toward an un-suspecting 1.95 m tall man who is standing
below.
How close to the side walk can the flower pot fall before it is too late for a warning shouted from the balcony to reach the man in time? Assume that the man below requires 0.353 s to respond to the warning, and the velocity of sound in air to be 342 m/s. The acceleration of gravity is 9.8 m/s2 .