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A hiker stands on the edge of a cliff 49...

A hiker stands on the edge of a cliff 490 m above the ground and throws a stone horizontally with an initial speed of `15ms^(-1)`. Neglecting air resistance, find the time taken by the stone to reach the ground, and the speed with which it hits the ground. (Take g`=9.8ms^(-2))`

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99 m/s
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