A stone is thrown straight up from the edge of a roof, 675 feet above the ground, at a speed of 16 feet per second.
A. Remembering that the acceleration due to gravity is -32 feet per second squared, how high is the stone 2 seconds later? .
Don't forget to enter the correct units.
B. At what time does the stone hit the ground? .
C. What is the velocity of the stone when it hits the ground? .

You can earn partial credit on this problem.