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Two oppositely rotating satellities of s...

Two oppositely rotating satellities of same are launched in the same orbit round the earth. The collide idealistically. What is the ratio of gravitational potential energy before and after collistion?

A

`2`

B

`1/2`

C

`sqrt(2)`

D

`1/(sqrt(2))`

Text Solution

Verified by Experts

The correct Answer is:
B
Before collision, `PE=mV=-(GMm)/r`
After collision, velocity will be zero. The wreckage will come to rest. The energy will be only potential energy.
`PE=-(GMm)/r=-(2GMm)/r`
Ratio=`1//2`
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