Question

1) A rescue helicopter is hovering over a woman whose boat has capsized. One of the rescuers tosses a life preserver straight down to the woman with an initial speed of 1.05 m/s and notices that it takes 1.55 s to reach the water. How high above the water was the preserver released? Note that the downdraft of the helicopter reduces the effect of air resistance on the falling life preserver, so that an acceleration equal to that due to gravity i reasonable.

2) You throw a baseball straight up with an initial velocity of 14 m/s. On the way up it passes a tree branch at a height of 7.4 m. How much additional time will pass before the baseball passes the tree branch on the way back down?

(For number 1, I got 19.159 and it was incorrect)

Answer 1