The centrifugal force acting on a body of mass ‘m’ kg rotating at a radius of ‘r’ meter and speed of N rpm is ‘F’ newton. If the centrifugal force need to be doubled either by keeping the radius constant or by keeping the speed constant, then the speed and radius respectively are

The centrifugal force acting on a body of mass ‘m’ kg rotating at

1.	The centrifugal force acting on a body of mass ‘m’ kg rotating at a radius of ‘r’ meter and speed of N rpm is ‘F’ newton. If the centrifugal force need to be doubled either by keeping the radius constant or by keeping the speed constant, then the speed and radius respectively are
A.	√2 N, 2 r
B.	√5 N, 2 r
C.	2 N, r/2
D.	2 N, √2 r
Answer» B. √5 N, 2 r