Suppose we define the y-axis to point vertically upward. When an object is in free fall, it has acceleration in the y-direction
A. ay = -g, where g=+9.80 m/s².
B. a, = g, where g=-9.80 m/s².
C. Which is negative and increases in magnitude as it falls.
D. Which is negative and decreases in magnitude as it falls.
E. Which depends on the mass of the object