A hiker stands on the edge of a cliff 490 mabove the ground and throws

1.	A hiker stands on the edge of a cliff 490 mabove the ground and throws a stonehorizontally with speed ground and throws of15 m s!. The time taken by the stone to reachthe ground is(a) 5 s (b) 10 s (c) 12 s (d) 15 s
Answer» $\huge\underline{\underline{\bf \orange{Question-}}}$ A hiker stands on the edge of a cliff 490m above the ground and throws a stone horizontally with SPEED ground and throws of 15 m/s. The time TAKEN by the stone to REACH the ground is $\huge\underline{\underline{\bf \orange{Solution-}}}$ $\large\underline{\underline{\sf Given:}}$ H = 490m v = 15m/s $\large\underline{\underline{\sf To\:Find:}}$ Time taken by stone to reach the ground (t) We KNOW that , ✪ $\large{\boxed{\bf \blue{t=\sqrt{\dfrac{2H}{g}}} }}$ $\implies{\sf t = \sqrt{\dfrac{2×490}{g}} }$ $\implies{\sf t = \sqrt{\dfrac{980}{9.8}} }$ $\implies{\sf t = \sqrt{100}}$ $\implies{\sf t = 10\:s }$ $\huge\underline{\underline{\bf \orange{Answer-}}}$ Option (b) 10s The time taken by the stone to reach the ground is ${\bf \red{10s}}$ .

A hiker stands on the edge of a cliff 490 mabove the ground and throws a stonehorizontally with speed ground and throws of15 m s!. The time taken by the stone to reachthe ground is(a) 5 s (b) 10 s (c) 12 s (d) 15 s

Answer»

$\huge\underline{\underline{\bf \orange{Question-}}}$

A hiker stands on the edge of a cliff 490m above the ground and throws a stone horizontally with SPEED ground and throws of 15 m/s. The time TAKEN by the stone to REACH the ground is

$\huge\underline{\underline{\bf \orange{Solution-}}}$