A satellite is moving around the earth's with speed `v` in a circular orbit of radius `r`. If the orbit radius is decreases by `1%` , its speed will

Options

A. increases by `1%`
B. increase by `0.5%`
C. decrease by `1%`
D. decrease by `0.5%`

Answer

b

Explanation

`(DeltaV)/(V)=-(1)/(2)(Deltar)/(r)=-(1)/(2)xx(-0.1%)=+0.5%``