In gravity - free space, a particle is in contact with the inner surface of a hollow vertical cylinder and moves in horizontal circular path along the surface. There is some friction between the particle and the surface. The retardation of the particle is

In gravity - free space, a particle is in contact with the inner surfa

1.	In gravity - free space, a particle is in contact with the inner surface of a hollow vertical cylinder and moves in horizontal circular path along the surface. There is some friction between the particle and the surface. The retardation of the particle is
Answer» ZERO INDEPENDENT of its VELOCITY PROPORTIONAL to its velocity proportional to the SQUARE of its velocity Answer :D