Question

The gravitational force between two objects is proportional to `1//R` (and not as `1//R^(2)`) where `R` is separation between them, then a particle in circular orbit under such a force would have its orbital speed `v` proportional to
A. `1//R^(2)`
B. `R^(0)`
C. `R^(1)`
D. `1//R`

Answer 1

Correct Answer - B
`F prop1//R implies F=k//R`
`F=mv^(2)//R`
`k/R=(mv^(2))/Rimplies v prop R^(0)`