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Answer:

Answer :-

The body will strike the ground with a velocity of 24.5 m/s .

Explanation :-We have :-

→ Height (h) = 30 m

→ Gravitational Acceleration (g) = 10 m/s²

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In this case :

• Initial velocity (u) of the body will be 0 m/s as it is thrown vertically downwards from a height .

• Acceleration (g) will be +ve, as the body is moving in the direction of gravity.

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Now, we can use the 3rd equation of free-fall to calculate the required speed .

v² - u² = 2gh

⇒ v² - 0 = 2(10)(30)

⇒ v² = 600

⇒ v = √600

⇒ v = 24.49 ≈ 24.5 m/s

146

Rosalinda

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