1. The problem statement, all variables and given/known data Basically there's a ramp; its inclined plane has length "a", the base has length "b" and its height has length "c". The ramp is stationary, but it has wheels under it. The ramp weighs 120N. The center of mass of the ramp is located at 2/3 of "b" on the horizontal axis and 1/3 of "c" in the vertical axis. Then a block is placed on top of the ramp (1). It weighs 80N. Given that the inclination of the ramp is α; sin α = 0.6 and "a" = 15m. How much will the ramp be displaced when the block reaches the end of the ramp (2)? Also, disregard any friction and assume the block is a point mass. 2. Relevant equations 3. The attempt at a solution I have a couple of questions to begin with.. Does the ramp get displaced only because it's specified a center of gravity? Like if the whole ramp was a point mass; would it not be displace at all? Then what happens if I place the center of gravity of a block on top of the center of mass of a ramp? Also; what role does the center of mass play in this particular problem?