Two satellites of same mass are launched in the same orbit round the earth so as to revolve in mutually perpendicular directions. They soon collide inelastically and stick together. The total energy of the system before collision is :

\frac{- G M m}{2 r}

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\frac{- G M m}{r}

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- \frac{2 G M m}{r}

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\frac{- G M m}{4 r}

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Solution

The correct option is B $\frac{- G M m}{r}$

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Two satellites of same mass are launched in the same orbit round the earth so as to revolve in mutually perpendicular directions. They soon collide inelastically and stick together. The total energy of the system before collision is :

The correct option is B −GMmr

The correct option is B $\frac{- G M m}{r}$