A sphere cannot roll on

Only under gravity and some initial impulsea sphere cannot roll without sliding on :

Assertion : A solid sphere cannot roll without slipping on smooth horizontal surface Reason : If the sphere is left free on smooth inclined surface. It cannot roll without slipping.

Assertion : A solid sphere cannot roll without slipping on smooth horizontal surface Reason : If the sphere is left free on smooth inclined surface. It cannot roll without slipping.

A solid sphere rolling on a rough horizontal surface. Acceleration of contact point is zero. A solid sphere can roll on the smooth surface.

A solid sphere rolling on a rough horizontal surface. Acceleration of contact point is zero. A solid sphere can roll on the smooth surface.

A sphere is rolling on a horizontal surface without slipping. The ratio of the rotational K.E. to the total kinetic energy of the sphere is

A solid sphere rolls on a smooth horizontal surface at 10 m//s and then rolls up a smooth inclined plane of inclination 30^@ with horizontal. The mass of the sphere is 2 kg . Find the height attained by the sphere before it stops (in m ).

A solid sphere rolls on a smooth horizontal surface at 10 m//s and then rolls up a smooth inclined plane of inclination 30^@ with horizontal. The mass of the sphere is 2 kg . Find the height attained by the sphere before it stops (in m ).