A hiker stands on the edge of a cliff 490 m above the ground and throws a stone horizontally with an initial velocity of 15 m/s.Neglecting air resistence,find the time taken by the stone to reach the ground and the speed with which it hits the ground.(g=9.8 m/s).Please provide the answer for this question.

Lets choose the origin of x and y axis at the edge of the cliff.The stone is thrown at the instant t=0 sec.The direction of velocity is along the positive x axis and y axis to be the vertically upward direction.

Now the equations of motion are

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