Three man A, B & C of mass `40 kg, 50 kg` & `60 kg` are standing on a plank of mass `90 kg`, which
Channel: Doubtnut
Date: 2020-01-28

Three man A, B & C of mass `40 kg, 50 kg` & `60 kg` are standing on a plank of mass `90 kg`, which is kept on a smooth horizontal plane. If A & C exchange their position then mass B will shift :-