A ball is dropped from a rooftop of a building and falls for two seconds. The acceleration of gravity is 9.8 m/s2. The ball is referred to at the two-second time.
-The distance the ball is below the rooftop in meters is
A)0.
B)4.9.
C)9.8.
D)19.6.
E)none of these.

Question

A ball is dropped from a rooftop of a building and falls for two seconds. The acceleration of gravity is 9.8 m/s2. The ball is referred to at the two-second time. 
-The distance the ball is below the rooftop in meters is
A)0.
B)4.9.
C)9.8.
D)19.6.
E)none of these.

Quizplus · Accepted Answer

Using the formula for distance traveled by an object under constant acceleration:
d = (1/2) * a * t^2
Where d=distance, a=acceleration, and t=time

Substituting the given values:
d = (1/2) * 9.8 m/s^2 * (2 s)^2
d = 19.6 meters

Therefore, the ball is 19.6 meters below the rooftop after two seconds. The correct choice is D.

A Ball Is Dropped from a Rooftop of a Building