Please explain in basic simple ways, including free body diagrams

Q 10 (10 pts) A projectile of mass m, = 3.25 ka travelling with an initial speed vn collides with and embeds itself into > stationary pendulum of mass m2 = 18.5 kg, and length e = 21.4 m. See the figure below. What must be the minimum initial speed V. so that the mood........ makes a vertical loop completely