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A cannon is at a castle on a cliff and at a hight of 100 m...

A cannon is at a castle on a cliff and at a hight of 100 m above the sea level. The cannon barrel points at an angle of +30.0◦ from the horizontal (pointing slightly upwards) and can give a maximum speed to the cannon ball of 60.0 m/s. Ignoring air resistance how close in the horizontal displacement should a ship be in order for the canon to be able to hit the ship. (hints: identify the motion, write the equations and calculate first the total time the ball is in the air). A ship has some size so we do not need

a. about 6.0 ×102 m

b. about 4.4 ×102 m

c. about 3.2 ×102 m

d. about 1.6 ×102 m

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