Mikasa plans to launch a Thunder Spear to a tooth of Eren’s Titan head located at west but a wind of 69.0 km/h is blowing towards the south. (a) If Thunder Spear’s airspeed (speed in still air) is 50.0 m/s, in which direction should she launch the spear? (b) What is the speed of the spear over the ground? Illustrate with a vector diagram. Assume that the propulsion of the spear keeps the travel at constant elevation.

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Projectile Motion