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Euron fires a 15kg bolt due West with a speed of 20 m/s from a scorpion...

Euron fires a 15kg bolt due West with a speed of 20 m/s from a scorpion (a big crossbow) at one of Daenerys dragons that is flying near the ground and moving due North with a speed of 5 m/s. The dragon has a mass of 200 kg. The bolt strikes the dragon and remains embedded in the dragons hide.  

a) calculate the final magnitude and direction of the velocity of the dragon and bolt.

b) show that this collision is inelastic by calculating the loss in the kinetic energy due to the collision

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