Laws Of Motion

A wooden block of mass \(5 \mathrm{~kg}\) rests on a soft horizontal floor. When an iron cylinder of mass \(25 \mathrm{~kg}\) is placed on the top of the block, the floor yields and the block and the cylinder together go down with an acceleration of \(0.1 \mathrm{~ms}^{-2}\). The action force of the system on the floor is equal to :