shouqprincess1 shouqprincess1

26-10-2020
Physics

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A rock is dropped off a cliff and strikes the ground with an impact velocity of 20m/s. How high was the cliff?(use a=-10m/s2)

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Аноним Аноним

26-10-2020

Answer:

20 m

Explanation:

by the formula,

[tex]2aS = V_{f}^{2} - V_{i}^2[/tex]

2 x 10 x S = 20^2 - 0

20S = 400

[tex]S = \frac{400}{20}[/tex]

S = 20 m

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