4 years ago

Which statement about gravity is true? L

Physics

1 answer:

stealth61 [152]4 years ago

7 0

Answer:

The last statement.

Explanation:

Gravity is mgh where m is the mass of the object or the person, g is the gravitational field strength acting on it and h is the height of alleviation of the object or the person and thus is not affected by other forces.

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liquid.

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That is almost the definition of a liquid. So the answer is a liquid.

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3 years ago

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3 years ago

You will need to use the Momentum Principle to do the first part of this problem, and the Energy Principle to do the second part

My name is Ann [436]

Answer

given,

Mass of satellite, m = 4500 kg

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Earth circular orbit radius, R = 9.3 x 10⁶ m

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we need to equate the gravitation force between earth and satellite with the centripetal force.

$\dfrac{GMm}{R^2}=\dfrac{mV^2}{R}$

$V = \sqrt{\dfrac{GM}{R}}$

$V = \sqrt{\dfrac{6.67\times 10^{-11}\times 6\times 10^{24}}{9.3\times 10^6}}$

V = 6559.89 m/s

b) Minimum amount of energy of satellite

$E = \dfrac{GMm}{r}-\dfrac{1}{2}mv^2$

$E =\dfrac{6.67\times 10^{-11}\times 6\times 10^{24}\times 4500}{9.3\times 10^6}}-\dfrac{1}{2}\times 4500\times 6559.89^2$

E = 9.68 x 10¹⁰ J

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4 years ago

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kifflom [539]

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