Question

Figure shows two block system, 4 kg block rests on a smooth horizontal surface, upper surface of 4 kg is rough a block of mass 2 kg is placed on its upper surface the acceleration of a upper blockwith respect to earth when 4 kg mass is pulled by a force of 30 newborn, is 1)6m/s 2)5 m/s 3)8m/s 4)2m/s

Answer 1