A projectile of mass 5 kg is ?red with an initial speed of 54 m/s at an angle of 55? with the horizontal. At the top of its trajectory, the projectile explodes into two fragments of masses 2.8 kg and 2.2 kg . The 2.2 kg fragment lands on the ground directly below the point of explosion 1.2 s after the explosion. The acceleration due to gravity is 9.81 m/s
Find the magnitude of the velocity of the 2.8 kg fragment immediatedly after the explosion