The elevators in the Landmark Tower in Yokohama, Japan are among the fastest in the world. They accelerate upward at w.125m/s^2 for 4.000s to reach their final speed. If these elevators start from rest, what is their final velocity? Give answer with 4 significant figures.

My answer is opptionc, just check with anyone else

The correct answer is c. hope this

Answer(a)   the matererials that are in contact, the two materials and the nature of their surfaces/// (b)/// the force pushing the two surfaces together, pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other