JEE Main 201912 Apr, Morning shiftPhysicsEasyRotational Motion140× since 2002
A man (mass = 50 kg) and his son (mass = 20 kg) are standing on a frictionless surface facing each other. The
man pushes his son so that he starts moving at a speed of 0.70 ms^–1 with respect to the man. The speed of the
man with respect to the surface is :