sowersm10
Answered

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Kara drops a rock from the edge of a cliff and it takes 7.00 s for the rock to reach the ground. What is the cliff’s height?

Sagot :

Answer:

h = 204.1 m

Explanation:

Given that,

Time taken to reach the ground, t = 7 s

We need to find the height of the cliff. We can find it using second equation of kinematics as follows :

[tex]h=ut+\dfrac{1}{2}at^2[/tex]

Here,

u = 0 (at rest initially)

a = g

So,

[tex]h=\dfrac{1}{2}gt^2\\\\h=\dfrac{1}{2}\times 9.8\times 7^2\\\\h=204.1\ m[/tex]

So, the cliff's height is 204.1 m.

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