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Gravtiational PE

If a satellit...

Question

If a satellite of mass 400 kg revolves around the earth is an orbit with speed 200 m/s then its

A

- 1.2 M J

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B

- 8.0 M J

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C

- 16 M J

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D

- 2.4 M J

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Solution

The correct option is C $- 16 M J$
PE= -2KE

= -2x1/2xMV²

given ,

mass is 400kg, V=200m/s

on substituting we get PE=-400x200x200

=-16x10⁶ J=-16 megajoules=--16MJ

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