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Lubov Fominskaja [6]
3 years ago
6

Does a satellite have its greatest speed when it is closest to or farthest from earth?

Physics
2 answers:
Jet001 [13]3 years ago
3 0
When it is closest to the earth.


Pie3 years ago
3 0
Gravitational force is inversely proportion to the square of distance between 2 objects. So a satellite will have greatest speed when it's closer to earth.
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A long thin rod of mass M and length L is situated along the y axis with one end at the origin. A small spherical mass m1 is pla
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Answer:

= - 5.65\times 10^{-2} J

Explanation:

Given data:

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d = 18*10^4 m

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Gravitational energy is given as

U =- G \frac{m_1 m_2}{r}

mass per unit length is given as

\sigma = \frac{M}{L} = \frac{18 \times 10^6}{2\times 10^4 m} = 900 kg/m

calculating potential energy

dU ==-G\int_{16\times 10^4}^{18\times 10^4} \frac{m_1 *dm}{r}

=-G\int_{16\times 10^4}^{18\times 10^4} \frac{m_1 *\sigma dr}{r}

=-G*m_1*\sigma\int_{16\times 10^4}^{18\times 10^4} \frac{dr}{r}

=-G*m_1*\sigma \left | ln r \right |_{16\times 10^4}^{18\times 10^4}

=-G*m_1*\sigma ln(1.125)

=-6.673 \times 10^{-11}*8*10^6*900*ln(1.125)

= - 5.65\times 10^{-2} J

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