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  • Satellites orbiting the earth have a finite life and sometimes debris of satellites fall to the earth. This is because a) the solar cells and batteries in satellites run out

Satellites orbiting the earth have a finite life and sometimes debris of satellites fall to the earth. This is because

a) the solar cells and batteries in satellites run out

b) the laws of gravitation predict a trajectory spiralling inwards

c) of viscous forces causing the speed of the satellite and hence height to gradually decrease

d) of collisions with other satellites

Answers (1)

The answer is the option (c)

P.E is given by \frac{-GM}{2r}

The negative sign shows the force of attraction between the satellite and Earth.

P.E gets gradually reduced due to atmospheric friction, and the radius/ height of the satellite keeps decreasing until it comes back to Earth with increasing speed and burns in the atmosphere.

Posted by

infoexpert23

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