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Q. A child stands on the edge of the cliff $10\, m$ above the ground and throws a stone horizontally with an initial speed of $5 \,ms ^{-1}$. Neglecting the air resistance, the speed with which the stone hits the ground will be ______$ms ^{-1}$ (given, $g=10 \,ms ^{-2}$ ).

JEE MainJEE Main 2023Motion in a Plane

Solution:

Correct answer is (a) 15

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