posted by HELP!!! .
The 50-kg stone has a speed of v_A = 8m/s when it reaches point A.Determine the normal force it exerts on the incline when it reaches point B. Neglect friction and the stone's size.
That will depend upon the angle of the incline at point B. If it is inclined theta to the horizontal, the normal force will mb
M g cos theta
whether there is friction or not, and regardless of spoeed.