a bobsled slides down an icy track making of 29 degrees with the horizontal. Assume that the motion is frictionless. a) how far must the bobsled slide in order to attain a speed of 91 km/h if initially at rest? I converted km/h to 25.27 m/s and I used d = (v^2)/(2gsin(theta)) where d= 67.1 m, which is correct. b)when will the speed be attained? I tried d/v -> 67.1/25.27 and had 2.65 s and 25/67.1 But the answer is wrong. So I am stuck on part b.