Question

7. The minimum value of F such the block of mass m
remains at rest w.r.t bigger block of Mass M
(a)(m+M)g
(b) um + Mg
(c)(m+M)g/u
(d) umg

PLEASE ANSWER FAST​

Answer 1

a=M+mF∑Fy=0⇒Ncosθ=mg∑Fx=0⇒Nsinθ=maa=gtanθF=a(M+m)=gtanθ(M+m)=F=(m+M)gtanθ

Hence,

option (c) is correct answer.