1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution The option (a) says that the 1st coin remains at its earlier position. Due to gravitational force, the 1st coin falls down, hence option (a) is wrong. I don’t understand the difference between option (B) and (C). In my opinion, both option says that all of the coins which have left the scale falls down having same position vector. I am not being able to apply Newton's laws of motion here.