Ex-63 motion in a plane: a hiker stands on the edge of a cliff 490 m above the ground and throws a s

A hiker stands on the edge of a cliff 490 , 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).
#a-hiker-stands-on-the-edge-of-a-cliff-490-above-the-ground-and/
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Because we know sy i.e. 490 m and not sx Therefore by using :( Everything should be along one direction as here it's in y direction) sy= uyt + 1/2 ayt² We get the time i.e 10 seconds

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