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If due to air drag, the orbital radius of satelite decreases from R to `R-DeltaR,DeltaRltltR`, then the expression for change is orbital velocity `Deltav` is [mass of earth M]:-A. `(DeltaR)/(2) sqrt((GM)/(R^(3)))`B. `-(DeltaR)/(2) sqrt((GM)/(R^3))`C. `DeltaRsqrt((GM)/(R^(3)))`D. `-DeltaRsqrt((GM)/(R^(3)))` |
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Answer» Correct Answer - A `V=sqrt((GM)/(R))=sqrt(GM) R^(-1//2)` `(DeltaV)/(V)=-(1)/(2)(DeltaR)/(R) necaise DeltaRrarrDeltaR` `DeltaV=sqrt((GM)/(R))(DeltaR)/(2R)` `DeltaV=sqrt((GM)/(R^(3)).(DeltaR)/(2)` |
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