Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) A particle is projected along a horizontal surface whose coefficient of friction varies as `mu=A/r^2`, where r is the distance from the origin is metres and A is a positive constant. The initial distance of the particle is 1m from the origin and its velocity is radially outwards. The minimum initial velocity at this point so the particle never stops is - Sarthaks eConnect

A particle is projected along a horizontal surface whose coefficient of friction varies as `mu=A/r^2`, where r is the distance from the origin is metres and A is a positive constant. The initial distance of the particle is 1m from the origin and its velocity is radially outwards. The minimum initial velocity at this point so the particle never stops is

A particle is projected along a horizontal surface whose coefficient of friction varies as `mu=A/r^2`, where r is the distance from the origin is metres and A is a positive constant. The initial distance of the particle is 1m from the origin and its velocity is radially outwards. The minimum initial velocity at this point so the particle never stops is

A.

`oo`

B.

`2sqrt(gA)`

C.

`sqrt(2gA)`

D.

`4sqrt(gA)`