A ball is dropped from a rooftop of a building and falls for two seconds. The acceleration of gravity is 9.8 m/s 2 . The ball is referred to at the two-second time. The acceleration of the ball in m/s 2 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/s 2 . The ball is referred to at the two-second time.  The acceleration of the ball in m/s 2 is
A) 0.
B) 4.9.
C) 9.8.
D) 19.6.
E) none of these.

Quizplus · Accepted Answer

The acceleration of the ball due to gravity is constant at 9.8 m/s^2, regardless of the time of fall. Therefore, the acceleration of the ball at the two-second time is also 9.8 m/s^2.

A Ball Is Dropped from a Rooftop of a Building