2 -Z A shell moving with a velocity of known components v v, and v explodes into three fragments of masses m , m, and m at point A at a distance d from a vertical wall. Derive 1' 2 3 0 expressions for the speeds of the three fragment immediately after the explosion, knowing the coordinates x, and y of the points A (i = 1, 2, 3) where the fragments hit the wall. With the i following numerical values compute the 3 velocities: A1 (-5 m, 0); A2 (12 m; 6 m); A3 ( 0 m; -9 m); d = 12 m; m 4 kg; m = 3 kg; v = 40 m/s; v = - 30 m/s; v =- 1200 m/s; - 1 3 X ""y Z = 5 kg; m 2