Question

If a rock is dropped off a cliff with the initial speed of 0 m/s what is rocks speed after three seconds if there is no air resistance

Answer 1

Using the formula:
Vy=Voy+gt
Vy=0+(9.8)(3)
Vy=29.4

Answer 2

Answer: = 44.15 m.

Explanation: well we can use the falling objects equation, which states that

d = 1/2 > ^2