A satellite is moving around the Earth with speed v in a circular orbit of radius r. If the orbit radius is decreased by 1% its speed will `........`

Options

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

Explanation

`v prop 1/(sqrt(r ))` % increase in speed `=1/2 ` % decrease in radius `=1/2 (1 %) = 0.5 %`