An object starts from rest and falls freely. What is the speed of the object at the end of 3.0 seconds? vf=vi+gt A.9.8 m/s B.19.6 m/s C.29.4 m/s D.48.5 m/s

Answer 1

Hello DeBrion,

The object starts from rest, so its initial velocity is zero: vi = 0 m/s

Then, since g = 9.8 m/s2 and t = 3 seconds, that would make vf = 0 + 9.8 x 3 = 29.4 m/s.

The speed of the object at the end of 3.0 seconds is 29.4 m/s ---> answer C.