Question

A stone is released from a height, what will be the velocity of the stone if it reaches the ground after 15 seconds? ( take g = 10m/s2)


(a)50 m/s

(b) 100 m/s

(c) 150 m/s

(d) 9.8 m/s

give correct I will mark u brainlist

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Answer 1

Answer:

time reaches to ground (t) = 15 s

t² = 2h/g

(15)² = 2×h/10

225×10 = 2×h

h = 2250/2

h = 1125 m

therefore,

$\boxed{height = 1125 m}$

now,

h = 1125 m

g = 10 m/s²

velocity to reach ground =

${v= \sqrt{2gh} }$

${v = \sqrt{2×10×1125} }$

$v = \sqrt{22500}$

v = 150

$\boxed{velocity (v) = 150 m/s}$

so,

velocity of stone = 150 m/s

Option C is correct ✌️✌️

Explanation:

hope it helps ✌️ ✌️✌️✌️

Answer 2

Answer:

option c is correct

Explanation:

hope it help you