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Urgent need help 100 points

Suppose that scientists observe violent gas eruptions on a planet with an acceleration due to gravity of 3.6 m/s2.

The jets throw sand and dust about 75 m

above the surface.


What is the speed i

of the material just as it leaves the surface?


Scientists estimate that the jets originate as high‑pressure gas speeds through vents just below ground at about 150 km/h.

How much energy per kilogram of material does the jet lose to nonconservative forces as the high‑speed matter forces its way to the surface and into the air?

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Answer: The velocity with which the sand throw is 24.2 m/s.

Explanation:

Explanation:

acceleration due to gravity, a =  3.9 m/s2

height, h = 75 m

final velocity, v = 0

Let the initial  velocity at the time of throw is u.

Use third equation of motion

The velocity with which the sand throw is 24.2 m/s.

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