Question

A block of weight 20 N is pressed against a vertical wall as shown in figure by applying a horizontal
force of the block (g = 10 ms?). If u , = 0.4 then
The least horizontal force required to keep the block in equilibrium is
[ ]
a) 40 N
b) 20 N
c) 10 N
d) 50 N
​

Answer 1

Answer:

I think it's answer could be 40N