Final answer:
The stone's horizontal motion remains constant at a velocity of 12m/s. The horizontal distance traveled by the stone is 42m. The stone undergoes no vertical motion.
Step-by-step explanation:
The stone is thrown horizontally outwards from a cliff at a velocity of 12m/s. Since there is no vertical motion and the acceleration due to gravity only affects the vertical motion, the horizontal motion of the stone remains constant throughout its flight. This means that the stone's horizontal velocity of 12m/s remains the same from the cliff to the water.
Using the equation distance = velocity x time, we can calculate the horizontal distance traveled by the stone. The stone takes 3.5s to reach the water, so the horizontal distance traveled is (12m/s) x (3.5s) = 42m. Therefore, the stone's horizontal motion can be described as a constant velocity of 12m/s for a horizontal distance of 42m.
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