I've been trying to go through the problems in our assigned textbook, College Physics, but like any other Serway book the material is not in-depth enough for me to be able to solve the problems easily. This one particular problem has got me thinking about how blocks would move across a surface when there are two surfaces: A small block of mass m = 2kg rests on the left edge of a block of length L = 3m and mass M = 8kg. The coefficient of kinetic friction between the two blocks is mu_k = 0.3, and the surface on which the 8kg block rests is frictionless. A constant horizontal force of magnitude F = 10N is applied to the 2kg block, setting it in motion. a) How long will it take before this block makes it to the right side of the 8kg block? (Note: Both blocks are set in motion when F is applied.) (b) How far does the 8kg block move in the process? My main concern is what kind of a force would be applied on this block with mass M; would it be that exact 10N force or something else? I'd really appreaciate if someone could shed some light on how one can comprehend a problem such as this, as I can't make sense of the method my teacher used. Thanks alot for any replies.