Question

The minimum value of mass m sp the whole system reqmins in equilibrium is

Answer 1

from figure we have

12×l=( l/2×m) + (3l/2)×3

12l =lm/2 +9l/2

24l = lm +9l

24l = l(m+9)

24l/l =m+9

24=m+9

m=15 kg.