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Potential Energy of an Object at a Height

At perihelion...

Question

At perihelion, the mechanical energy of Pluto's orbit has

A

its maximum value

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B

its minimum value

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C

the same value as at every other point in the orbit

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D

the value which depends on the sense of rotation

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Solution

The correct option is C the same value as at every other point in the orbit
As there is no external force, thus according to Conservation of energy, total mechanical energy of the system is constant at every point.

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