mohon bantuannya !!!!!

T = mP a
mQ g - T = mQ a
--------------------- +
mQ g = (mP + mQ)a
a = g mQ / (mP + mQ)
   = (10 m/s²)(2 kg) / (3 kg + 2 kg) = 4 m/s²

h = v₀t + 1/2 at²
Karena v₀ = 0
t = √(2h / a)
  = √[2(18 m) / (4 m/s²)] = 3 s