why a sphere cannot roll on a frictionless inclined surface?

Asked by mac12303190 | 10th Nov, 2010, 12:00: AM

Expert Answer:

Dear student
Rolling down an incline cannot occur without friction, since the torque needed for the angular
acceleration can only be supplied by the frictional force, f . The other forces act through the center
of the rolling object and therefore produce zero torque.
However, friction does not dissipate energy in rolling because the bottom of the wheel is momentarily at rest
at each point of contact and is not sliding on the surface. As a result, the frictional force does no work.
We hope that clarifies your query.

Answered by  | 11th Nov, 2010, 10:14: AM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.