[a]1. The problem statement, all variables and given/known data[/b] The block shown in Fig. 5-27 lies on a smooth plane tilted at an angle = 25.5° to the horizontal, with µk = 0.17. Figure 5-27 (a) Determine the acceleration of the block as it slides down the plane. ________ m/s2 (down the plane) (b) If the block starts from rest 9.50 m up the plane from its base, what will be the block's speed when it reaches the bottom of the incline? _________ m/s 2. Relevant equations F=m(a) Ff=Mk(N) [c]3. The attempt at a solution[/b] I drew a Vector Diagram so that gravity was pointing directly downward from the box, so that means that the Fg vector is at an angle of -64.5 from the Horizontal, (or 25.5 degrees from the Y axis, whichever you prefer!), and then so Fg has horizontal and Vertical components. Fy(net)=m(a)=Fa+Fgx-Ff Ff=.17(Fnormal) ??? I'm very confused..it seems like I need to know the mass to solve the problem, but the other half of me doesn't even know where to begin.