A rock falls off a cliff and hits the ground after 6 seconds. What is its velocity right before it hits the ground? A) .31 m/s B) 3.3 m/s C) 29.4 m/s D) 9.8 m/s
The equation: Vf = Vi + at should answer this question, where: Vf = Unknown Vi = 0 a = acceleration = 9.8 m/s^2 t = 6 seconds Plug values in: Vf = 0 + 9.8*6 Vf = 58.8 m/s I noticed that this is not on your list of answers, which means that some value from your problem is incorrect. I would double check that.