MHT CET Physics question

A sphere cannot roll on

(A)A smooth horizontal surface
(B)A smooth inclined surfaceCorrect
(C)A rough horizontal surface
(D)A rough inclined surface

Answer: (B)

Solution

Rolling is maintained by friction, which supplies the torque that changes the spin as the speed changes; on a rough horizontal or rough inclined surface a sphere rolls, but

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Question ID VK-040439