A particle is projected from the surface of the earth with a velocity of $5\,\text{m/s}$ at an angle with the horizontal. Another particle is projected on the surface of some other planet with a velocity of $3\,\text{m/s}$ at the same angle and it follows a trajectory which is identical to the trajectory of the projectile fired on earth. The value of the acceleration due to gravity on that planet is [given that $g = 9.8\,\text{m/s}^2$]