Question

If a ball with an original velocity of 0 is dropped from a tall structure and takes 7 Seconds to hit the ground what velocity does the ball have when it reaches the ground

A. 156.8

B. 240.1

C. 68.6

D. 34.3

Answer 1

Gravity adds 9.8 m/s to the downward speed of a falling object every second. (On Earth.)

In 7 seconds, gravity adds (7 x 9.8 m/s) = 68.6 m/s to the downward speed of a falling object.

(IF air resistance has no effect on the object.)