A cannon is shot from the top of a 30m tall castle at incoming rebels. The canno

Question

A cannon is shot from the top of a 30m tall castle at incoming rebels. The cannon at 50 m/s at 20o angle. a) How much time is the cannon ball in the air? b) At what speed does the cannon ball hit the ground when it lands? c) How far from the castle does the cannon hit the ground? Please Help!!! I don't even know where to start A cannon is shot from the top of a 30m tall castle at incoming rebels. The cannon at 50 m/s at 20o angle. a) How much time is the cannon ball in the air? b) At what speed does the cannon ball hit the ground when it lands? c) How far from the castle does the cannon hit the ground? Please Help!!! I don't even know where to start

Explanation / Answer

Given height of the building   h = 30 m initial speed of cannon u =   50 m/s angle   ?   = 20 ^ o        1) time taken by the cannon to reach ground                      t = ( 2 h / g ) ^ ( 1 /2 )    2)        the horizontal and vertical components of velocities                                   v_x = u cos ?                     v _y = gt           the magnitude of velocity                     V = ( v_x ^2 + v_y ^2 )^ (1 /2) 3)    R = u sin? * t     plug the values and get the answers

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