Question

Q A stone is dropped from a cliff. What will be A speed liken it has fallen from 100 m ? . its

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Answer 1

Correct answer:-

Initial speed = zero

We have to find speed of stone when it has fallen 100m..

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◈ For a body falling freely under the action of gravity, g is taken positive.

Third equation of kinematics :

v² - u² = 2gH

v denotes final speed

u denotes initial speed

g denotes acc. due to gravity

H denotes distance/height

➝ v² - 0² = 2(10)(100)

➝ v² = 2(1000)

➝ v = √2000

➝ v = 44.72 m/s.

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Answer 2

Answer:

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