Question

two blocks A & B of masses 5kg & 3kg respectively rest on a smooth horizontal surface with B over A.The co-efficient of friction b/w A & B is 0.5 .The maximum horizontal force that can be applied to A, so that there will be motion of A and B without relative slipping,is ??

Answer 1

.5*(3+5)=4N or .5*3=1.5N