A rescue helicopter is hovering over a person whose boat has sunk. One of the rescuers throws a life preserver straight down to the victim with an initial vertically downward velocity of 1.40 m/s and observes that it takes 1.80 s to reach the water. How high above the water was the preserver released?
Suppose that a person takes 0.35 s to react and move his hand to catch an object he has dropped. Assume that acceleration due to gravity on Earth is 9.8 m/s2.
How far does the object fall on Earth?
How far does the object fall on the Moon, where the acceleration due to gravity is one sixth of that on Earth?