JEE Advanced Model Paper 13 with solutions for online practice

A solid sphere of mass M is kept on a long smooth plank of mass M which isresting on a smooth horizontal surface as shown. J1 and J2 are the simultaneousimpulses given to the sphere and plank respectively. What is the relation betweenthe magnitudes of J1 and J2 such that there is no relative motion between thesphere and plank at their point of contact?