B) 22.4 m A) 11.7 m 11) An arrow is shot horizontally from a height of 4.9 m above the ground. The initial speed of the arrow is 4 m/s. Neglecting friction, how long will it take the arrow to hit the ground? C) 1.0 s B) 4.6 s D) 6.0 s A) 1.4 s 12) A rock is kicked horizontally at a speed of 16 m/s from the edge of a cliff. The rock strikes the ground 6 from the foot of the cliff of height H as suggested in the figure, which is not drawn to scale. Neglect air resistance. How long is the rock in the air? 16 m/s 65 m D) 4.1 s C) 1.2 s B) 5.5 s A) 11.2 s 2

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Projectile Motion