At 150m, what bobsled is moving at v=0? It has to be moving at some sort of speed in a certain direction (the bobsled track). Friction or no friction, you can't determine the velocity at the bottom of the hill.
I say this as openly as possible. If you have an answer, please, and I mean PLEASE...
12. There isn't enough information to answer the question. Is it a 2-man or 4-man sled? Is the sled at its maximum weight? What track you are on? How steep is it? According to the question, the sled is already moving. How far down the track is this? After the first curve you could be going...