At an Independence Day celebration show, a large firework is shot from the ground and, in the first stage of its bursting pattern, splits into two unequal parts. Assume that the firework has a mass of m0 = 0.30 kg and is launched from a cannon at an angle of θ0 = 38.1∘ with an initial velocity of | v0 | = 20 m/s. Just as the firework reaches its hight point in its trajectory, it explodes into two pieces. Immediately after the explosion, the first piece, with a mass of m1 = 0.2 kg flies off at an angle θ1 = 150∘ relative to the positive (forward) horizontal axis at a velocity of | v1 | = 5 m/s relative to the ground. Required:
Calculate the trajectory angle, θ2 of the second piece immediately after the explosion.