A 100 kg gun fires a ball of 1 kg horizontally from a cliff of height 500 m. if falls on the ground at a distance of 400 m from the bottom of the cliff. Find the recoil velocity of the gun.

Q: A 100 kg gun fires a ball of 1 kg horizontally from a cliff of height 500 m. if falls on the ground at a distance of 400 m from the bottom of the cliff. Find the recoil velocity of the gun.
(acceleration due to gravity = 10 ms-2)