Knud's Catapult

Knud's victims have acquired bows and arrows that stop him getting within 40m of their village. Can he stay out of harms way and continue his siege by elevating his catapult, changing the launch angle? Check your answer against the model!

Does your value for the launch velocity agree with the model? Two ranges are displayed for the catapult, why is this? Is Knud going to need an upgrade or can he continue bombarding the villagers?