Question

If an object is dropped from a tall building and it hits the ground 3.0 s later, what is the velocity of the object when it hits the ground? (Remember that the velocity is downward)

V= _____ m/s

Answer 1

-29.4 m/s

Step-by-step explanation:

Answer 2

-29.4 m/s

Step-by-step explanation:

Initial velocity is 0 m/s.

Acceleration is -9.8 m/s².

Time is 3.0 s.

v = at + v₀

v = (-9.8)(3.0) + 0

v = -29.4 m/s