A force `F` is applied on a block of mass `5 kg` as shown in figure. Co-efficient of friction between the wall and clock is `(sqrt(3))/(2). (g = 10m//s^(2))`

Select correct option(s)

Options

A. Magnitude of minimum force `F` so that block doesn't slip on the wall is `40 N`.
B. Magnitude of minimum force `F` so that block doesn't slip on the wall is `20 N`.
C. If `F lt 40N` then block will side downwards
D. If `F lt 40N` then block will slide upwards

Answer

A, C

Explanation

`(F)/(2) + mu(Fsqrt(3)/(2)) = 50`
`rArr (F)/(2) + F xx (3)/(4) = 50 rArr (5F)/(4) = 50 rArr F = 40N`