Two satellite A and B go round a planet P in circularorbits having radii 4R and R respectively. If the speed of the satellite A is 3v, the speed of the satellite B will be

Two satellite A and B go round a planet P in circularorbits having rad

1.	Two satellite A and B go round a planet P in circularorbits having radii 4R and R respectively. If the speed of the satellite A is 3v, the speed of the satellite B will be
Answer» 12 v 6 v `(4)/(3)` v `(3)/(2)` v Solution :Orbital VELOCITY, `v=sqrt((GM)/(R))RARR(v_(A))/(v_(B))=sqrt((R_(B))/(R_(A)))=sqrt((R)/(4R))=(1)/(2)` `:. (v_(A))/(v_(B))=(3v)/(v_(B))=(1)/(2)rArr v_(B)=6v`.