1. The problem statement, all variables and given/known data The block shown in Fig. 4-48 lies on a smooth plane tilted at an angle θ = 24.5° to the horizontal. Ignore friction. http://www.webassign.net/giancoli5/4_48.gif (visit this site for picture) (a) Determine the acceleration of the block as it slides 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? 3. The attempt at a solution a.) 9.8/sin(24.5)=23.6 m/s^2 which is the acceleration down the slope where the x=ma and the y=mg. Is this correct? It feels like I am forgetting something... b.) From the equation v^2=vi^2+2ad, v^2=0+2*23.6*9.5 v=21.2m/s at the bottom of the incline.