On a frictionless surface, you push a big box of mass 5 kg so that it, in turn, pushes a smaller box of mass 4 kg which is next to it and in contact with it. If you push the box with a force 180N. How much force does the big box push the the small box with? 

Answer rating: 100% (QA)

In this case as there is no friction and we are not told of any other external forces on the boxes w... View the full answer